Bruce A. Kimball

Langdell on Contracts and Legal Reasoning: Correcting the Holmesian Caricature

During the first decade of his tenure as dean of Harvard Law School (HLS) from 1870 to 1895, Christopher C. Langdell (1826–1906) produced closely related works on contracts and sales that exercised great influence pedagogically and jurisprudentially. Pedagogically, the casebooks on contracts and sales introduced case method teaching into American legal education. In jurisprudential terms, these works placed Langdell with Frederick Pollock and William R. Anson in England and Oliver W. Holmes, Jr., in the United States, as the leading theorists of contract during its "golden age" of "overwhelming predominance" in Anglo-American law.¹

One purpose of this essay is to identify five significant contributions that Langdell made to contract doctrine through his writings in the 1870s.² These include, first, his effort to identify abstract, parsimonious dimensions of contract; second, his identifying offer, acceptance, and consideration as those dimensions; third, his advancing the distinction between sales and contract in the United States; fourth, his rejecting the will theory and introducing the bargain theory of contract; and, fifth, his promulgating the distinction between bilateral and unilateral contracts.

Notwithstanding these contributions—indeed, partly because of his introduction of parsimonious abstraction—Langdell has been pilloried in the standard historical account of American legal theory. Guided by the assessment of Holmes, scholars have long considered Langdell "one of the principal sources of the sterile formalism,"³ or "classical legal thought," that predominated in the United States from about 1870 to 1920.⁴

But Langdell's characteristic mode of reasoning in the field of contracts and in general jurisprudence is more complicated than this received view. The other purpose of this essay is to propose a new interpretation of his thinking. This new interpretation is undertaken by addressing the traditional criticism, derived from Holmes, that deductive logic and formal consistency determined Langdell's contract jurisprudence. Holmes abruptly launched this Procrustean critique against Langdell in 1880 after approving and encouraging his scholarship through the 1870s. But Langdell's mode of reasoning—even on issues traditionally invoked to demonstrate his formalism—is actually three-dimensional, exhibiting a comprehensive yet contradictory integration of induction from authority, deduction from principle, and analysis of justice and policy. The contradiction lies in Langdell's combining these three while claiming to emphasize logical consistency and disregard justice and policy. By this new interpretation, Langdell's mode of reasoning, ironically, fits not Holmes's critique, but the "paradox of form and substance" that has been considered one of Holmes's greatest insights about judicial reasoning.⁵

Langdell fell into this paradox fundamentally due to his desire to elevate and legitimate legal practice and the legal profession through rigorous legal education. Believing that lawyers must acquire strong legal science, which he associated with formal, deductive consistency, Langdell was led to endorse formalistic arguments from principle even while recognizing that they sometimes incorporate legal fictions and that expediency and justice directly shape legal decisions.

I. Cases on Contracts (1870, 1871)

Explaining the circumstances surrounding Langdell's writings and identifying his significant contributions to contract doctrine entail a number of smaller tasks. One is to develop a full and accurate chronology of the production of Langdell's seminal writings on contracts and sales during the 1870s, together with the published responses, most written by Holmes.⁶ Another task is to explain the sources and organization of Langdell's writings, while consulting relevant archival records including annotated casebooks and class notes of Langdell, his colleagues, and their students, as well as the records of Langdell's publisher, Little, Brown, Co.⁷ The third task is to consider the doctrinal context of contract law, including prominent, contemporary writers on contracts. Foremost among these writers are Langdell's mentor Theophilus Parsons and Pollock, Anson, and Holmes. Finally, Langdell's jurisprudence must be considered in relation to his pedagogical purposes, since his writings on contracts and sales were intended for students.

Langdell's writings on contracts began to appear in October 1870, when Little, Brown published the first half of his Cases on Contracts, the first teaching casebook in law or any other field.⁸ His reasons for adopting an inductive method of teaching from cases has been analyzed elsewhere.⁹ The reasons for compiling and publishing the casebook were more mundane. Such a collection was far more efficient for the students, who, otherwise, "all ... would want the same books [of case reports] at the same time."¹⁰ In addition, publishing the casebook saved the library's copies of case reports from being "destroyed in a few years by excessive use upon a [small] number of pages."¹¹

The massive project of preparing the casebook took nine months at most because Langdell began no earlier than February 1870, when he left his active law practice in New York City and joined the faculty at HLS. Moreover, he probably accomplished little during the spring semester when he was writing lectures for other courses and became increasingly occupied with institutional matters and curricular reforms. But since he was replacing his mentor Theophilus Parsons, who had taught contracts, Langdell surely anticipated teaching this subject from the time of his appointment. Consequently, although no draft manuscripts remain, Langdell likely decided during the spring to write the novel textbook.

The choice of subject for the first casebook stemmed from his service as the chief research assistant for Parsons's ponderous, two-volume treatise, Law of Contracts, during the early 1850s when Langdell studied at HLS. The original reports of more than six thousand cases were examined for the treatise by HLS law students whom Parsons hired to brief the cases and to submit their work to Langdell for evaluation and synthesis.¹² This working relationship was manifested in the manuscript pages of the treatise, which consisted of "a brief margin of text by Parsons, clearly and neatly written out at the head, then three or four times the space in [notes] and citations in the inky, strong hand of C. C. Langdell." To the research assistants, the treatise "appeared to be mainly the work of Langdell,"¹³ and distinguished readers concluded that Langdell's "notes were the most valuable part" of Parsons's treatise.¹⁴ Consequently, Langdell already knew some six thousand, pre-1852 cases when he began preparing the casebook in the spring of 1870; and this made it possible to complete the first half of Cases on Contracts by the start of classes in October 1870.¹⁵

Langdell's practice of case method teaching has been analyzed elsewhere,¹⁶ but it is instructive to note here a few features of the casebook reflecting its pedagogical purpose. One of the most striking was the absence of headnotes or commentary, which testified to the inductive character of his teaching. This inductive approach contrasted with the antecedent treatise tradition that endeavored "to render cases subordinate to principles, ... to throw the main body of [cases] into the notes, and to incorporate those only in the text, which seemed to afford the best illustrations of the doctrine under consideration."¹⁷ Parsons, in fact, carried this subordination to an extreme by adopting "the rigorous exclusion from the text, of all cases."¹⁸ But rather than presenting cases illustratively to demonstrate previously announced principles, Langdell's inductive purpose was "to compel the mind to work out the principles from the cases."¹⁹

Another pedagogical innovation was the casebook's inclusion of overruled and conflicting cases. Through this material, Langdell pointed students toward the reasoning behind the cases rather than the prevailing rules, as shown by his own analysis of the casebook's opening cases. For instance, the second case concerned the question of how long a contractual offer is legally operant. Langdell observed that the King's Bench in 1790 held that an offer is good only at the time when first made. In the third case, the same court, twenty years later, in order to accommodate transactions through the mail, announced the new doctrine that a contractual offer continues indefinitely. In the fourth case, ten years later, the same court reverted to the earlier doctrine in order to protect the offeror. Meanwhile, in the fifth case, "another court was at a loss how to apply the doctrine of [the third case] thinking that it might involve the consequence of making an offer irrevocable during the period of its continuance."²⁰ Hence, Langdell's series of cases required students to focus upon the underlying reasons and belied the prevailing "English attitude ... link[ing] authority with judicial status."²¹

This series of cases demonstrates also the developmental character of the casebook, revealing to students "the growth, development, or establishment of ... essential doctrines" in the law.²² Law was not static, but evolving. This "chronological arrangement" of cases was new,²³ and Langdell's attention to historical situation is shown by his addition to the title and citation of each case the normally omitted information about location, court, and precise date of the case.²⁴ Thus, Langdell omitted what treatise writers provided—didactic instruction—and included what was usually omitted: factual background about the historical situation of each case.

Early in 1871 the American Law Review published the lone review of the 1870 edition of Cases on Contracts. This was the Review's second anonymous commentary referring to Langdell, both written by Oliver W. Holmes, Jr., one of the Review's two editors.²⁵ The first, appearing in October 1870, sharply criticized the condition of HLS under Langdell's predecessors and added that "the learning and ability of [Langdell's faculty] warrant us in predicting that their labors will make Harvard Law School what it ought to be."²⁶ Continuing the support and praise of the dean's work, Holmes, in the 1871 review, commended the casebook as "original and instructive." In particular, he approved the inductive method reflected in the "wisely omitted" headnotes and adjudged the developmental ordering of cases "most instructive and interesting."²⁷ Apart from the praise, Holmes offered a few recommendations, which Langdell embraced.

Holmes said that, on the subject of forbearance, the cases had been collected with "an over-scrupulous minuteness" and recommended reducing the number of "contradictory and unreasoned" decisions. In the second edition, Langdell responded by excising twenty-five cases from the Forbearance section, and noting the change in his preface. Second, Holmes suggested adding "a full index,"²⁸ and Langdell responded in 1871 by providing a thirteen-page index whose discursive entries extended for several lines, imparting rules, holdings, and cross-references to relevant cases in the casebook.²⁹

Finally, Holmes justified his praise for Langdell's developmental ordering of cases by observing, "Tracing the growth of a doctrine in this way not only fixes it in the mind, but shows its meaning, extent, and limits as nothing else can."³⁰ The import of these words, if not some actual terms, seem to be echoed in the preface that Langdell wrote a few months later for the complete, first edition: "Each of these doctrines ... is a growth extending in many cases through centuries. This growth is to be traced in the main through a series of cases."³¹ Hence, Holmes's review may have inspired the evolutionary language in Langdell's preface, and this possibility is strengthened by the recent, converse suggestion that Holmes later borrowed Langdell's language for his own famous 1895 essay "The Path of the Law."³² By either interpretation, Langdell and Holmes were closely attuned to the former's developmental ordering of cases that the latter found "most instructive." This mutually affirming relationship between Langdell and Holmes continued throughout the 1870s.

In October 1871 Little, Brown published the completed, first edition of Cases on Contracts, subsuming the 1870 edition and adding a large section on conditional contracts along with the index.³³ Following the preface explaining and justifying his case method in evolutionary terms, the 1871 casebook distributed 336 total cases into three divisions: "mutual consent" with 25 cases and no subdivisions, "consideration" with 139 cases spread across ten subdivisions, and "conditional contracts" with 172 cases distributed into nine subdivisions. Within the doctrinal subdivisions, the cases were arranged geographically and then chronologically under each geographical area, with a few exceptions.³⁴ The geographical and chronological subtotals are shown in Table 1. This arrangement further demonstrates Langdell's attention to the historical situation of each case, reflected in his adding the location, court, and date to the title of each case. Commensurately, Langdell sometimes adverted to the geographical and chronological situation in his later Summary of Contracts.³⁵

Table 1. Geographical and chronological distribution of cases in C. C. Langdell, Cases on Contracts (1871)

Geographical subtotals		Chronological subtotals

Country	Cases	Period	Cases	Percentage

England	310	Pre-1700	134
Ireland	1	1700–1799	49
Scotland	2	Prior to 1800	183	52 percent
France	1	1800–1851	116	34 percent
US Supreme Court	2	1852–1870	46	14 percent
Massachusetts	10
New York	8
Connecticut	1
Pennsylvania	1
Total	336	Total	336

As indicated by Table 1, the great majority of cases in Langdell's casebooks were English, and most exceptions came from jurisdictions heavily influenced by England: Massachusetts and New York. This selectivity was dictated by practical limitations: few case reporters existed and Langdell was working without help under the pressure of a tight deadline. Over time, his choice of cases became more American and contemporary. In addition, Langdell focused on English, Massachusetts, and New York cases because the most important developments in contract law "had occurred since 1750 in the increasingly commercialized and industrialized society of England. In the United States, New York and Massachusetts were the premier jurisdictions of commercial and industrial expansion ... and their courts had first and most continuously wrestled with the contractual problems presented by megabusiness and macroindustrialization."³⁶

One brief review of the 1871 edition appeared, again in American Law Review and again written anonymously by Holmes, who repeated his "very high opinion" of Cases on Contracts. On pedagogical grounds, Holmes again endorsed the omission of headnotes and praised the thirteen-page index, which exceeded his hopes. Holmes expressed one reservation: "We do not agree with ... his seemingly exclusive belief in the study of cases....We think [a beginning student] would find the present work a pretty tough pièce de résistance without a text-book or the assistance of an instructor." In jurisprudential terms, Holmes reaffirmed "Mr. Langdell's learning and remarkable powers"³⁷ and pointed to Langdell's first significant, doctrinal contribution to the field.

Holmes praised Langdell's abstraction of general dimensions of contract, observing: "There is nothing of what codifiers ... call the 'manual method.' A contract concerning coal is not indexed under the head Coal, nor even under the popular name of the contract, as Charter-party or Insurance. The cases are referred to under the general principle of the law of contracts."³⁸ The "manual method" was employed by prominent writers such as Kent (1827), Story (1844), Metcalf (1867), Leake (1867), Parsons (1853, 1855), Hilliard (1872), and Bishop (1878), who organized their discussion of contracts around particular, operational topics. For example, the different kinds of parties who might enter into contracts usually constituted separate doctrinal categories: innkeepers, drunkards, spendthrifts, seamen, aliens, slaves, infants, married women, outlaws, and so forth.³⁹ Yet, even while presenting such particularistic accounts, these writers recognized the need "to elucidate and systematize, as far as practicable, the general law applicable to the subject."⁴⁰ This need was prompted by the growing extension and complexity of commerce, which increased uncertainty and led merchants to seek contractual agreements anticipating unforeseen and unusual circumstances through their conceptual power. In addition, abstraction of rules tended to normalize doctrine so that the same rules applied to all parties regardless of station.⁴¹ The movement toward abstraction also anticipated the "national habit" of creating "regulated, systematic, impersonal bureaucracies" at the end of the nineteenth century.⁴²

Progress toward "conceptualizing contract" is credited to the small group of leading, nineteenth-century contract theorists: Pollock, Anson, Holmes, and Langdell.⁴³ Among this group, Langdell, who preceded the other three by a few years, may even be considered "the first theoretician of contract law in the United States."⁴⁴ At the least, his attempt to identify abstract dimensions of contract, which Holmes praised again in 1886,45 is Langdell's first, significant contribution to the field.

Holmes also praised Langdell's complementary contribution of introducing parsimony as a guiding principle for abstracting dimensions of contract. As he wrote in his preface:

... the number of fundamental legal doctrines is much less than is commonly supposed; the many different guises in which the same doctrine is constantly making its appearance, and the great extent to which legal treatises are a repetition of each other, being the cause of much misapprehension. If these doctrines could be so classified and arranged that each should be found in its proper place, and nowhere else, they would cease to be formidable from their number.⁴⁶

Endorsed by Holmes in 1872 and again in 1886,⁴⁷ Langdell's invocation of parsimony served to correct the multifarious nature of contract doctrine at the time. For example, William Story's 1844 treatise presented seventy-seven divisions and subdivisions of doctrine, some abstract such as "mutual promises," some operational and particular such as "innkeepers," and both kinds overlapping. Melville Bigelow preserved this multitude in revising the treatise for publication in 1874.⁴⁸ In 1853 Parsons devoted 342 pages to the classification of parties to a contract, distinguishing joint parties, agents, brokers, servants, attorneys, trustees, executors and administrators, guardians, corporations, and so forth.⁴⁹

In contrast to these many, particular categories, Langdell parsimoniously identified the most salient, abstract dimensions. The great majority of the cases that Langdell drew from Parsons's treatise come from a small fraction of its 1,500 pages. Of the 117 cases that appear in both, Langdell drew three quarters (88) from about five percent of Parsons's treatise.⁵⁰ Compared to Parsons's treatise, Langdell's casebook presented a highly focused selection of the most salient doctrinal categories. For example, Langdell gave particular attention to the cases in a five-page section that Parsons entitled "Contracts on Time."⁵¹ This opaque category was refined and elaborated in Langdell's 1870 casebook into the first, 160–page section on "Mutual Consent," that is, offer and acceptance. The other major section of the 1870 casebook was 245 pages devoted to "Consideration," which Parsons covered in 45 pages.⁵² Langdell thus abstracted from Parsons's sprawling treatise the most salient doctrinal dimensions, which he refined and elaborated.

Consequently, the 1870 edition of Cases on Contracts became the first text on contracts published in the United States or, apparently, in Britain organized around "the basic requirements of offer, acceptance, and consideration" or, more parsimoniously, "the two most important common elements, consideration and assent."⁵³ This was Langdell's second, significant contribution.⁵⁴

II. Cases on Sales (1872)

Even as Holmes praised Langdell's "most valuable" Cases on Contracts for a third time in 1871 when reviewing a different work,⁵⁵ Langdell was completing Cases on Sales, published by Little, Brown in May 1872. Prepared for use in his course on sales during the 1872–73 academic year,⁵⁶ this was the first volume written in the United States on the distinct domain of sales, although it is largely forgotten today.⁵⁷ Yet, the appearance of Langdell's casebook, particularly in conjunction with a separate volume on contracts, was highly significant at the time. In England, the law of sales had originated in "law merchant"—the commercial law administered in merchants' courts that reflected their customs and emphasized the concept of title to goods as well as a sense of fair play in an open market. In the seventeenth century, the common law courts had gradually usurped the authority of the merchants' courts and adjudicated disputes over sales through principles of contract, subtly emphasizing the intentions of the parties. Meanwhile, in 1677 Parliament enacted the Statute of Frauds, whose seventeenth section stipulated formalized requirements for sales in order to remedy the increasing problem presented by fraudulent claims of sale. By the beginning of the nineteenth century, the confluence of merchant law, common law doctrines derived mostly from contract, and case law decided under the Statute of Frauds had created a complex variety of doctrines that gradually coalesced through a series of cases during the 1800s.⁵⁸

Therefore, American treatise writers during the first half of the nineteenth century made little distinction between contracts and sales. In 1827 James Kent's entire discussion of contracts was conducted under the head "of the contract of sale." In 1844 William Story incorporated "sale of personal property" into his treatise on contracts.⁵⁹ In the 1850s Parsons sprinkled discussion of sales throughout The Law of Contracts, as "if that were the only or chief topic of the book."⁶⁰ In 1867 Theron Metcalf's Law of Contracts discussed sales under "acceptance of offer," "fraud," and "unlawful contracts."⁶¹ Conversely, the two American treatises nominally devoted to the "law of sales" addressed the many operational categories and doctrinal rules found in contracts treatises.⁶²

The first book devoted to distinctive legal issues pertaining to sales was published in 1845 by Colin Blackburn, a prominent English jurist. Blackburn confined his treatise to the effect of the sale upon the property rights in the goods being sold. He chose this topic because, due to the increasing distance and complexity of commercial transactions, executory sales—in which the buyer receives title to the goods sold, but does not possess them—were becoming common and creating uncertainty and disagreements about the property rights in goods sold. In 1868, building upon Blackburn's work, the first comprehensive treatise on legal issues pertaining to sales, as distinguished from contract, was published by Judah P. Benjamin, a former U.S. senator from Louisiana and prominent leader in the Confederacy who had emigrated to England.⁶³Benjamin on Sales has therefore been called "the first treatise on the English law of sale."⁶⁴

Two years later, in preparing the first volume published in the United States devoted solely to distinctive legal issues pertaining to sales, Langdell relied heavily on Blackburn and Benjamin. Printed notes in the text and handwritten annotations on students' copies of the casebook from Langdell's classes reveal that he frequently adverted to Benjamin and Blackburn for insights into doctoral questions while also distinguishing his own views from theirs.⁶⁵ Nevertheless, Langdell still faced a great challenge in distinguishing specific cases and issues in sales from those in contract. For example, the very first case in Cases on Contracts, Payne v. Cave (1789), appears to be a quintessential case of sale because it established the rule that, at an auction, "the title passes to auctioned goods when the goods are 'knocked down' to the buyer. But in Payne v. Cave the issue was not framed in terms of ... title. The question was approached from the standpoint of mutuality of assent in contract. Such assent, said the court, was 'signified on the part of the seller by knocking down the hammer.... '"⁶⁶ Hence, although the transaction looks quintessentially like a sale, Langdell's characteristic attention to underlying reasons appropriately led him to treat Payne v. Cave under contract.⁶⁷

Langdell's effort to distinguish legal issues in sales complemented the project of abstracting fundamental categories of contract and was embraced by Holmes, Anson, and Pollock⁶⁸ a few years later. The novelty of Langdell's effort appears in the fact that, upon assuming responsibility for teaching Sales at HLS in 1876, Professor James B. Thayer assigned Langdell's Cases on Sales and began the course by assuring the students (and, it seems, himself) that, although "the subject is [usually] treated as a branch of the law of contracts," it made sense to have a separate casebook and course devoted to Sales, if "a treatise is one of a series" and "such a course of lectures is a part of a series or system of courses."⁶⁹ Meanwhile, Professor J. C. Gray told his students that sales belonged to the category of contracts concerning "property."⁷⁰

The originality of Langdell's complementary projects is also shown by Little, Brown records detailing the publication chronology of Langdell's casebooks in both fields, as seen in Table 2. This table reveals how Langdell alternately issued installments of casebooks in each domain and thereby made a third, significant contribution to contracts scholarship in the United States by advancing the distinction between contracts and sales.

Table 2. Publication chronology of Langdell's casebooks on contracts and sales

Casebook Date	Oct. 1870	Feb. 1871	Oct. 1871	May 1872	Projected

Cases on Contracts	v. 1, pt. 1		v. 1, pt. 2		v. 2
Cases on Sales		v. 1, pt. 1		v. 1, pt. 2	v. 2

Source: The data for Table 2 are drawn from Little, Brown Papers, box 1, "Manuscript Cost book for Little Brown. 1865–," sect. L, 65; Langdell, Cases on Sales (1872), pref. No copy of Cases on Sales, v. 1, pt. 1, is extant; its existence is known only through the Little, Brown records.

Beyond that contribution, Cases on Sales demonstrates the development of Langdell's editorial principles in constructing casebooks. Though continuing to omit headnotes, he responded to Holmes's call for editorial help for students by adding more and longer footnotes explaining editorial excisions and providing some commentary.⁷¹ He continued to emphasize the historical situation of cases and the evolutionary growth of doctrine, first, by adding the date, court, and location of each case to its citation and, second, by adopting the geographical and chronological arrangement of the previous casebook. The casebook's two chapters on "Statute of Frauds" and "Executory and Executed Sales" were each divided into six subsections, within which cases were arranged geographically and then chronologically under each geographical area, with a few exceptions.⁷²

The selection of the cases also indicates the development of Langdell's editorial principles. As seen in Table 3, Cases on Contracts had 336 cases; Cases on Sales had 252. In Contracts, 92 percent of the cases were English; in Sales 78 percent. Pre-1800 cases constituted 52 percent in Contracts; 4 percent in Sales. Post-1851 cases amounted to 14 percent in Contracts and 28 percent in Sales. Thus, the collection in Cases on Sales was significantly more selective, American, and recent than in Cases on Contract. All these points responded to Holmes's urging to reduce the "overscrupulous minuteness" of the selection in Cases on Contract.

Table 3. Geographical and chronological distribution of cases in C. C. Langdell, Cases on Sales (1872)

Geographical subtotals		Chronological subtotals

Country	Cases	Period	Cases	Percentage

England	197	Pre-1700	1
Ireland	1	170–1799	8
US Supreme Court	1	Prior to 1800	9	4 percent
Massachusetts	21	1800–1851	173	68 percent
New York	29	1852–1871	70	28 percent
Vermont	1
Maine	1
Maryland	1
Total	252	Total	252

The topical index to the sales casebook also reveals Langdell's editorial principles. More substantive than that in Cases on Contracts, the nineteen-page index in Sales was fifty percent longer for twenty-five percent fewer cases and contained longer entries, ranging up to thirty lines of text. Also more articulated, the index in Sales comprised 18 alphabetical doctrinal headings and subheadings with 109 numbered paragraphs written in full sentences, with cross-references to case names and pages in the casebook.⁷³ Here, too, Langdell seemed to be responding to Holmes's call for more help for students.

Cases on Sales received another anonymous, complimentary review by Holmes, whose approval is not surprising, given that the inductive and evolutionary approach had impressed him from the outset and that Langdell had taken his earlier suggestions to heart. Holmes counted and commended the number of cases on sales, reduced from the "over-scrupulous" number in Cases on Contract. Langdell not only provided an index, as Holmes had requested in the first review, but elaborated the prototype in Cases on Contract (1871), and Holmes therefore extolled "the admirably constructed index" in Cases on Sales.⁷⁴ As of 1872 Holmes was wholeheartedly encouraging Langdell in his novel genre.

III. Cases on Contract (1879) and Summary of Contracts (1880)

Langdell never completed the second volume of either casebook, after his work on contracts and sales was "interrupted and delayed"⁷⁵ in the mid-1870s by administrative burdens and by preparing a casebook and a 130–page "summary" of doctrine on equity pleading. This shift in scholarly attention stemmed from his professional experience, his personal interest, and new curricular requirements for courses in this subject. Despite the shift in topic, his approach to this work reflected the same pattern as in contracts and sales. First, he issued the casebook in two successive parts in 1875 and 1876. Then, he turned to the summary, which appeared in 1877 followed by the entire casebook in one volume in 1878.⁷⁶

Langdell's Summary of Equity Pleading prompted another, highly complimentary, anonymous review from Holmes, who wrote:

If we were to select any part [of the Summary] as of pre-eminent excellence, we should mention the [historical] introduction. The development of the ecclesiastical procedure as there unfolded, and the suggestion that that [the procedure] of the common law is founded upon the assumption that the parties to an action owe no obedience to the court, with the subsequent explanation of equitable doctrines as the result of a procedure in which litigants are compelled to obey, will take the student farther into the heart of the subject than many a weary hour of reading elsewhere; and, under the author's hand, even the function of parchment in the time of Lord Eldon becomes instructive.⁷⁷

Here Holmes applauded Langdell's historical and functional explanations for the nature of legal doctrine, which Holmes himself was working out in the middle and late 1870s.⁷⁸ In fact, Holmes's enthusiastic praise for Langdell's originality in the Summary of Equity Pleading—"there is not an argument or conclusion in the book, even upon familiar law, which does not throw a new and often brilliant light upon what it touches"⁷⁹—suggests that in 1877 Holmes felt that Langdell was drawing from the inductive historicism of his casebooks jurisprudential implications similar to his own.

This glowing review for the Summary of Equity Pleading extended the trajectory of Holmes's increasing praise for the supplementary material appended to Langdell's casebooks. From 1870 to 1871 to 1872 to 1877, each time Langdell developed the supplementary material, Holmes had encouraged him more. Appreciating this, Langdell had sent Holmes page proofs of the Summary and a final copy when it appeared.⁸⁰ In addition to this positive response to his longest writing thus far, Langdell also received news at this point that Cases on Contracts was selling out and that the publisher desired a new edition.⁸¹

Therefore, in 1878, soon after sending the full casebook on equity pleading to the printer, Langdell began a second edition of Cases on Contracts. He changed the organization and selection of cases very little. The basic divisions remained Mutual Consent, Consideration, and Conditional Contracts, while he added an eleventh subdivision to the "Consideration" section. He also eliminated 28 cases, including 25 older ones from forbearance, and added 18 new ones, none before 1700 and 13 after 1869.⁸² These changes comport with feedback from Holmes's reviews of the 1870, 1871, and 1872 casebooks. Langdell devoted most of his effort to writing a 131–page "summary of topics covered by the casebook," responding, in part, to Holmes's reservation that students would find the casebook "a pretty tough pièce de résistance without a text-book or the assistance of an instructor."⁸³

In fall 1879 Little, Brown issued the second edition of Cases on Contract, and in February 1880 a highly unfavorable, insulting review appeared in the Southern Law Review located in St. Louis. The anonymous author deprecated case method teaching as Langdell's "hobby," ridiculed the omission of headnotes and inclusion of overruled cases, and concluded that legal treatises and digests "not volumes of cases without headnotes, are the law-books of the future."⁸⁴ In keeping with his custom, Langdell made no response;⁸⁵ but an extended rebuttal by James Myers soon appeared in the Southern Law Review, maintaining correctly that the reviewer did not understand Langdell's inductive case method, whose purpose "is to teach the student the habit of legal analysis and synthesis, and not to make the student's mind a mere dictionary of decisions."⁸⁶ Meanwhile, in March 1880 the distinguished English jurist A. V. Dicey, with "the most unfeigned admiration," ranked Langdell's book among great American legal writings.⁸⁷

The most noted review of the second edition of Cases on Contracts appeared anonymously in the American Law Review. Written by Holmes,⁸⁸ the review addressed Cases on Contracts (1879) together with Principles of the English Law of Contract by the distinguished English authority William R. Anson. Holmes devoted but a paragraph to Anson's book and suggested that "its more penetrating qualities" might have been derived from reading Langdell's brief index to the first edition of Cases on Contract.⁸⁹ Turning from this remarkable depreciation of Anson, Holmes then devoted two pages to Langdell's second edition, primarily the appended summary. Calling the summary of "unequal value" in teaching students about the principles underpinning the law, Holmes wrote, "no man competent to judge can read a page of it without at once recognizing the hand of a great master. Every line is compact of ingenious and original thought." Indeed, "there cannot be found in the legal literature of this country, such a tour de force of patient and profound intellect working out original theory through a mass of detail and evolving consistency out of what seemed a chaos of conflicting atoms."⁹⁰

Nevertheless, the appended summary was "equally extraordinary in its merits and its limitations," continued Holmes. He then let fly barbed criticism, which must have caught Langdell off guard. Indeed, it is likely that Langdell felt blind-sided by the barbs, given the supportive tone and substance of Holmes's earlier reviews and the fact that Langdell likely conceived the summary "of topics covered by the casebook" as a natural extension of the topical indexes that Holmes had previously extolled. Holmes now construed the summary to reveal "the weak point in Mr. Langdell's habit of mind. Mr. Langdell's ideal in the law, the end of all his striving, is the elegentia juris, or logical integrity of the system as a system. He is, perhaps, the greatest living theologian.... If Mr. Langdell could be suspected of ever having troubled himself about Hegel, we might call him a Hegelian in disguise, so entirely is he interested in the formal connection of things."⁹¹

This shift in Holmes's judgment and tone must be interpreted in light of two factors. First is that Langdell's appended summary of contracts did not adopt the historical and functional arrangement of the Summary of Equity Pleading (1877) that Holmes had so admired. Neither a historical introduction nor a functional organization of the content according to the procedure of an action⁹² appeared in the summary of contracts. Instead, Langdell preserved the alphabetical organization of the topical indexes.

The second factor contributing to Holmes's disappointment was that his jurisprudential views had continued to develop significantly since 1877. In the late 1860s and early 1870s, Holmes sought, like Langdell, to abstract principled order from the sets of inconsistent rules left from the demise of the writ system and forms of action in the common law. Beginning in about 1872, Holmes began to argue that particular historical circumstances had given rise to various rules, that many such rules had continued to be functionally beneficial after their original generating circumstances no longer obtained, and that, as a result, legal fictions had been developed over the centuries to explain or justify these rules and doctrines. Hence, Holmes must have believed that Langdell's historical and functional approach in the Summary of Equity Pleading comported closely with his views at that time. By the end of the 1870s, Holmes concluded that such rules and doctrines could not be made logically consistent and that jurists had to distinguish between parts of doctrine that could be logically systematized and parts that derived from historical circumstance or "policy."⁹³ Consequently, Holmes likely concluded in 1880 that Langdell had retreated from the jurisprudential view that Holmes himself regarded as progressive in 1877. Whatever his reasons, Holmes's review gave rise to the longstanding view that Langdell's summary of contracts presented a deductive or geometrical pyramid of contract doctrine.⁹⁴

The separate publication of Summary of Contracts in 1880 completed Langdell's seminal publications on contracts and sales.⁹⁵ No reviews seem to have been published apart from a laudatory five-line notice by Holmes⁹⁶ and brief commending references.⁹⁷ The most significant response appeared in Holmes's The Common Law (1881), whose evident borrowing from the Summary reveals Langdell's additional contributions to contract doctrine.

IV. Holmes's Borrowing in The Common Law (1881)

Comprising lectures delivered at the Lowell Institute in Boston in November and December 1880 and published in March 1881, The Common Law includes three chapters on contract and opens with a famous line drawn directly from Holmes's 1880 review of Cases on Contracts (1879): "The life of the law has not been logic; it has been experience." From that starting point, the opening pages of the first lecture set forth Holmes's thesis that legal rules emerge and develop in response to historical exigencies and are later rationalized ex post facto to achieve a fictional logical consistency.⁹⁸

Although this opening and thesis seem to target Langdell, The Common Law does not employ the barbs of the 1880 review. Of the nine explicit references to Langdell's writings on contracts, three are positive; and six respectfully object to Langdell's "ingenious" or "logical" analyses.⁹⁹ Apart from those explicit references, however, "Holmes borrowed, without attribution, Langdell's doctrinal insights" from the Summary of Contracts,¹⁰⁰ notwithstanding Holmes's claims to originality, which have long been credited by historians.¹⁰¹

One reason for the borrowing is that Holmes needed the expertise, not having carefully studied the subject of contracts. Another reason is that, in summer 1880, he was under "deadline pressure for his contract lectures" scheduled for late fall.¹⁰² In addition, Holmes greatly respected Langdell's knowledge of the case law, as shown by his prior reviews. Finally, Holmes was virtually obliged to consult Langdell's Summary because it appeared at the end of June just as Holmes was beginning to write his three lectures on contract.¹⁰³ Holmes could scarcely ignore it, and upon completing his lectures in September, he published a brief, anonymous review of Langdell's Summary, closing with the freighted observation, "It may be desirable, at a proper time, to give some reasons for different conclusions on many essential points; but that time is not the present."¹⁰⁴ Less than eight weeks away, the Lowell lectures provided the "proper time" for Holmes to address the "many essential points."

After delivering the lectures in November–December 1880, Holmes revised and published them in March 1881 as The Common Law (1881). In April Holmes recommended to Frederick Pollock that he read Langdell's Summary of Contracts, equivocating between high praise and damning criticism just like Holmes's published review: "A more misspent piece of marvelous ingenuity I never read, yet it is most suggestive and instructive. I have referred to Langdell several times in dealing with contracts [in The Common Law] because to my mind he represents the powers of darkness. He is all for logic and hates any reference to anything outside of it.... But he is a noble old swell whose knowledge[,] ability and idealist devotion to his work I revere and love."¹⁰⁵ Among the "suggestive and instructive" insights borrowed by Holmes was Langdell's fourth original contribution: refuting the will theory and introducing the bargain theory of contract.

In the mid-nineteenth century, contract doctrine was still amorphous and marked by "a confused combination of subjective and objective thinking."¹⁰⁶ In particular, historians have debated the time and the process by which the "objective" view of contract superseded the "will theory." It is generally agreed that the "subjective" will theory—holding that contractual obligations derive from the subjective will or intentions of the parties—predominated early in the nineteenth century. By the end of the nineteenth century, the objective view—holding that the parties' "words and conduct rather than their unexpressed intentions" determine contractual obligations—prevailed. Beyond this general agreement, when and how the shift occurred are explained in different ways,¹⁰⁷ although the "refutation of the will theory of contract" has generally been credited to Holmes.¹⁰⁸

However, prior to Holmes's declaration, Langdell had expressly stated, "As to the rule that the wills of the contracting parties must concur, it only means that they must concur in legal contemplation, and this they do whenever an existing offer is accepted.... In truth, mental acts or acts of the will are not the materials out of which promises are made; a physical act on the part of the promisor is indispensable."¹⁰⁹ In these words, Langdell explicitly "relegated the will theory of contract formation to a legal fiction."¹¹⁰ Not only did Langdell write these words in the Summary of Contracts that Holmes studied while preparing the contracts chapters for The Common Law in the summer of 1880, but Langdell refuted the will theory in his classroom in the mid-1870s.

As a student at HLS from 1875 to 1878, William A. Keener recorded Langdell's words anticipating the language of the Summary: "The rule that the minds of the contracting parties must meet simply means that they must, in legal contemplation, concur; and this they do whenever an existing offer is accepted. Mental acts or acts of the will are not the essence of a promise. A physical act is indispensable, and when done, can only be undone by a physical act.... Upon mutual consent, law only regards consent manifested, not the abstract state of mind."¹¹¹ Consequently, in the mid-1870s Langdell was already teaching the "refutation of the will theory of contract," one of the significant "doctrinal insights" that Langdell originally contributed and that Holmes borrowed in The Common Law.¹¹²

Commensurate with refuting the will theory of contract, Langdell introduced the bargain theory of contract. Scholars have conventionally credited this new conception to Holmes whose bargain theory rested on "an essentially new analysis of consideration," namely treating consideration as the sole inducement for each party.¹¹³ In Holmes's often quoted words, "It is the essence of a consideration, that, by the terms of the agreement, it is given and accepted as the motive or inducement of the promise. The root of the whole matter is the relation of reciprocal conventional inducement, each for the other, between consideration and promise."¹¹⁴

But Holmes's view again appears first in Langdell's Summary: "Every consideration is ... the promisor's sole inducement to make the promise. As the law cannot see any inequality in value between the consideration and the promise, so it cannot see any motive for the promise except the consideration."¹¹⁵ Holmes, therefore, was "echoing Langdell's earlier analysis." In fact, "Holmes's theory of consideration, which he seems to have borrowed in large part from Langdell, was probably the most successful of Holmes's contract theories in terms of acceptance and influence."¹¹⁶

To be sure, claiming priority for any jurisprudent is somewhat conjectural because the nature of consideration was much debated during the nineteenth century. Thus, scholars have maintained that "the novelty of Holmes's [bargain] theory of contract has been greatly exaggerated."¹¹⁷ But students' notes reveal that, already in the early 1870s, Langdell was teaching to his classes that, "when [a] promise is first held to be a consideration" in the sixteenth century, the cases make it appear that "the promise was of earnest to bind a bargain."¹¹⁸ Moreover, Langdell's introduction of bargain theory is manifested at a more technical level.

"Consideration" was conventionally understood to comprise a "benefit" to the promissor and a "detriment" to the promisee.¹¹⁹ This formulation required that the benefit's value to each party be assessed in order to determine the equivalency of exchange. But this requirement posed a problem for the objective, bargain theory because the determination of value of a benefit was inevitably subjective. "The value of most considerations ... is a thing which the law cannot measure; it is not merely a matter of fact, but a matter of opinion," wrote Langdell.¹²⁰ Consequently, in order to eliminate the parties' subjective motives, Langdell declared that "benefit to the promisor is irrelevant to the question of whether a given thing can be made the consideration" and that a "detriment to the promisee is a universal test of the sufficiency of consideration."¹²¹

This detriment-only "formulation of the doctrine of consideration became classic" with the rise of bargain theory and has been attributed to Pollock and to Holmes. But Langdell's priority appears in several ways. First, the textual evidence does not sustain the attribution to Pollock;¹²² and Holmes's discussion begins with Langdell's detriment-only formulation, without attribution.¹²³ Second, James Barr Ames explicitly identified the detriment-only formulation as original with Langdell.¹²⁴ Finally, an HLS student recorded in his class notes in October 1876 that, in the opening lecture to his contracts course, Ames told the class: "Consideration in law = detriment incurred by promisee at request of promisor."¹²⁵ This significant statement indicates that already by 1876 Ames was transmitting to students as established doctrine the detriment-only formula that he attributed to Langdell. Consequently, Langdell must have announced this formulation in 1870–71, 1871–72, or 1872–73 when Ames attended Langdell's course on contracts, before Ames began teaching it in 1873–74. This chronology confirms that reducing consideration to "detriment to the promisee," identifying consideration as the sole inducement, and viewing contract as a bargain, constitute a significant contribution that Langdell formulated in the early 1870s.

Langdell's fifth contribution was, in the words of Ames, his "emphasis upon and promulgation of the distinction between unilateral and bilateral contracts."¹²⁶ The centrality of this distinction for Langdell followed from his abstracting offer, acceptance, and consideration as primary, salient dimensions of contract. Thus, Langdell invoked the distinction throughout the Summary of Contracts, including the final sentence.¹²⁷ Langdell also emphasized the distinction in his teaching, as shown by the flyleaves from Ames's and Keener's copies of Langdell's Cases on Contracts (1871) used in Langdell's class during the early 1870s.¹²⁸

Historians "do not have much information" on problems arising from "unilateral communications" through the early nineteenth century.¹²⁹ In 1862 the central problem of partial performance of consideration—subsequently defined by Langdell as a "unilateral contract"—was addressed in the English case Offord v. Davies.¹³⁰ But in 1867 Metcalf omitted the issue, and Leake in the same year discussed what Langdell called a "unilateral contract" under the heading "contracts arising upon executed consideration."¹³¹ In 1874 Bigelow, in his revision of Story's prominent treatise, discussed "unilateral contracts," but his term was a misnomer, meaning simply an unaccepted offer which, he admitted, "cannot properly be called a contract before acceptance."¹³² As if recognizing Bigelow's misnomer, Pollock in 1876 employed "unilateral promise" to mean what Bigelow called a "unilateral contract"—a promise without an acceptance. Elsewhere Pollock briefly addressed, without naming, the situation in which "the proposal or acceptance of an agreement may be communicated by conduct as well as by words."¹³³ In 1879 Anson neither named nor analyzed the situation in which the proposal is a promise and the acceptance is the performance of the consideration, though Anson briefly explained that "proposal and acceptance need not necessarily be written or spoken, but may be acted, wholly, or in part."¹³⁴

Consequently, Ames was correct in asserting that Langdell introduced and promulgated the distinction between bilateral and unilateral contracts in the early 1870s. While this distinction is overshadowed by his other four contributions,¹³⁵ it most clearly demonstrates Holmes's unacknowledged borrowing. In The Common Law, Holmes repeatedly adopted and extended the bilateral/unilateral distinction, without crediting Langdell.¹³⁶ In this fashion, he borrowed from and built upon Langdell's new distinction and terminology, while making it appear deficient rather than original.

V. Langdell and Holmes on the Mailbox Dilemma

Notwithstanding these significant contributions made in his contracts scholarship during the 1870s, Langdell's mode of legal reasoning has persistently been criticized as suffering from "that most ill-defined of legal ailments: formalism."¹³⁷ The origin and locus classicus of this criticism appeared in Holmes's 1880 review:

Mr. Langdell's ideal in the law, the end of all his striving, is the elegentia juris, or logical integrity of the system as a system. He is, perhaps, the greatest living theologian.... A single phrase [from Langdell's summary of contracts] will illustrate what is meant, 'It has been claimed that the purposes of substantial justice and the interests of contracting parties as understood by themselves will be best served by holding etc ... and cases have been put to show that the contrary view would produce not only unjust but absurd results. The true answer to this argument is that it is irrelevant; but'.... The reader will perceive that the language is only incidental, but it reveals a mode of thought which becomes conspicuous to a careful student.
... The life of the law has not been logic; it has been experience. The seed of every new growth within its sphere has been a felt necessity. The form of continuity has been kept up by reasonings purporting to reduce every thing to a logical sequence; but the form is nothing but the evening dress which the newcomer puts on to make itself presentable according to conventional requirements. The important phenomenon is the man underneath it, not the coat; the justice and reasonableness of a decision, not its consistency with previously held views. No one will ever have a truly philosophic mastery over the law who does not habitually consider the forces outside of it which have made it what it is.¹³⁸

These words are always cited in support of the charge of formalism made against Langdell's mode of legal reasoning,¹³⁹ and it is important to clarify exactly the nature of the complaint.

Holmes's critique, when interpreted in light of Langdell's scholarly contribution of parsimonious abstraction, has often been understood to accuse the Summary of Contracts of building a systematic pyramid of contract doctrine based upon a few premises, as in Euclidean geometry. However, the Summary does not present an axiomatic, hierarchical framework, descending from basic definitions to principles to specific rules, as do the Roman law books that Langdell knew well.¹⁴⁰ In fact, the Summary can scarcely be considered a "treatise," because "Langdell eschewed any hierarchical ordering of subjects, instead ... 'arranging them in alphabetical order.'"¹⁴¹ In the Summary "the arrangement of subjects ... indicates nothing as to the order in which they should be read, and every reader must exercise his own taste and judgment as to the order in which he will read them, or whether he will read them in any order," as Langdell wrote.¹⁴² Furthermore, the Summary, Langdell tells us, "embraces only a part of the subject of Contracts" and does not cover "the subjects discussed."¹⁴³ It summarizes neither contract doctrine nor the topics addressed.

The Summary constitutes an alphabetized collection of "separable, brilliant doctrinal analyses"¹⁴⁴ arranged in 187 numbered paragraphs distributed under 26 headings: sixteen major headings and another ten subheadings under the major heading of "consideration." All of these headings, with the exception of "debt," correspond to divisions or subdivisions of the casebook.¹⁴⁵ Consequently, a student or teacher could employ the alphabetical "summary" like an encyclopedia to find an interpretation of the cases regarding a particular topic faced in the casebook. If, for example, a class was about to begin the cases in chapter three, section four, concerning "conditions subsequent" in the casebook, then the students or teacher could flip back to the appendix, find the alphabetized heading under that entry, and read the analysis of the cases.¹⁴⁶ Hence, "the Summary was written for the sake of the Cases, and the two were designed to be companions... .[T]he cases are constantly cited and discussed without any statement of them, it being always assumed that the reader has them before him."¹⁴⁷ The appended "summary" was clearly a pedagogical reference guide, as Holmes acknowledged after making his barbed criticism.¹⁴⁸

A narrower understanding of the formalism charge is that Langdell viewed law not as a geometrical pyramid, but as a purely deductive system, in which logical consistency is the sole criterion of validity. Thus, Langdell was devoted to "elegentia juris, or logical integrity of the system as a system." But Langdell was not exclusively deductive, as Holmes knew well. Langdell inductively inferred the premises for his deductions from the cases and always produced his summaries—on contracts, equity pleading, and equity jurisdiction—a few years after his casebooks. He built the summaries on the casebooks, not vice versa, and his inductivism was extolled by Holmes in the reviews from the 1870s and in 1886. Furthermore, because induction rarely leads to a comprehensive, coherent system, Langdell's writings on contracts and sales do not yield a deductive system. Langdell's writings on contracts and sales—including his Summary of Contracts—present some salient abstract dimensions or categories (offer, acceptance, and consideration, above all) under which are collected "a treasure trove of separable, brilliant doctrinal analyses" on technical questions, reflecting the approach of a practicing lawyer who had handled technical questions in separate cases for fifteen years.¹⁴⁹

At its heart, the Holmesian critique therefore asserts not that Langdell was Euclidean or purely deductive, but that he neglected what Holmes called "the forces outside of" the law. Those "forces outside of" the law have conventionally been considered under the two categories of "justice" and "policy," as indicated respectively in Langdell's two phrases quoted by Holmes: "substantial justice" and "interests of contracting parties." Taken together, justice and policy—often called "fairness" and "convenience," respectively, in nineteenth-century writings—are labeled concerns of "acceptability" in the influential analysis of Thomas Grey.¹⁵⁰ Holmes's fundamental criticism of Langdell and, therefore, of legal formalism or "classical legal orthodoxy" contends that he regarded acceptability as "irrelevant" in determining doctrine and analyzing decisions in cases.

Proof of Holmes's criticism has consistently been found in Langdell's analysis of the mailbox dilemma, on which Holmes quoted Langdell: "the purposes of substantial justice and the interests of the contracting parties ... [are] irrelevant."

The mailbox dilemma posed the question of when a contract offer should legally be considered to be accepted: upon the offeree's posting of the mailed acceptance or upon the offeror's receipt of the mailed acceptance. The importance of this dilemma grew during the eighteenth and nineteenth centuries due to reliance upon the mails amid the increasing distance, complexity, and volume of commercial transactions. When and how could a manufacturer in England revoke offers to buy cotton from growers in Mississippi or Egypt? All these factors gave "rise to difficulties in practice" and to a vexing legal dilemma, according to Pollock in 1876.¹⁵¹ Langdell's seven-page discussion of the dilemma comprises one page introducing the problem, three pages addressing authority, or case law; two pages addressing principle, or doctrinal logic; and one page addressing acceptability, or justice and policy.¹⁵²

Authority presented two distinct resolutions of the question for an American lawyer. In 1818 the King's Bench in England held in Adams v. Lindsell that a contract became effective when the offeree put the acceptance in the mail. Parsons and Anson invoked the authority of this case, and Pollock declared it to be "the first and perhaps still leading case on the matter."¹⁵³ Yet, the Supreme Judicial Court of Massachusetts in 1822 held oppositely in McCulloch v. Eagle Insurance Company: a contract was not formed until the offeror received the signed, accepted contract in the mail. Hence, the rule of Adams "had not yet become settled law in American jurisdictions" in the 1870s.¹⁵⁴ Even in England, Pollock stated in 1876 regarding the mailbox dilemma that "the actual state of the law cannot be laid down with much confidence."¹⁵⁵ This indeterminacy makes it likely, if not necessary, that Langdell proceeded inductively with a fresh interpretation of the cases, quite apart from principle. Moreover, Langdell was obliged to heed the authority of the Supreme Judicial Court of Massachusetts. Here was an additional factor, external to principle, that he had to consider.

Faced with the indeterminacy of case law in the United States, Langdell, in his three pages addressing authority, therefore either examined the cases inductively on their own terms or favored the leading decision of the Massachusetts Supreme Judicial Court. In either case, Langdell provided a compact but thorough overview of fourteen cases—all included in his casebook—and concluded that McCulloch was the only unconditional, unanimous decision directly on point.¹⁵⁶

In the ensuing two-page analysis of principle, Langdell arranged the Adams argument "in the form of a syllogism" and concluded that "the fault of this syllogism is in the major premise, which is untrue."¹⁵⁷ Instead, Langdell argued that, since "a letter of acceptance ... contains by implication a counter-offer," and since "communication to the offeree is the essence of every offer," and since an unreceived offer is uncommunicated, then "a letter of acceptance ... is accepted" when "the letter of acceptance reaches the original offerer."¹⁵⁸ While this conclusion supported the decision in McCulloch, Langdell's logical analysis of doctrine was no less susceptible to objection than his interpretation of cases. For example, he did not indicate how an infinite loop of counter-offers and counter-acceptances could be avoided. If Langdell actually drew his premises from a priori principle, uninformed by cases, then it seems surprising that he did not select the premises so as to avoid such circularity.

Hence, there is neither evidence nor reason to favor the view that deduction from a priori principle dictated Langdell's preference for McCulloch over the converse view that his induction from cases guided his selection of principles. But even if it is granted that Langdell reasoned inductively on the mailbox dilemma, that approach still comports with "the so-called formalist methods ... disparaged by the Holmesians," because the approach looks only to cases and doctrine.¹⁵⁹ The sine qua non of Langdell's formalism lies in his treating acceptability—justice and policy—as "irrelevant," as Holmes contended.

Holmes's contention was regarded as authoritative through the mid-twentieth century.¹⁶⁰ Then, in 1983, Holmes's critique was insightfully refined by Thomas Grey, who observed, "Throughout his work, Langdell appealed to considerations of justice or policy." Nevertheless, Grey maintained, "these arguments of justice and policy do not bulk large in the Langdellian corpus."¹⁶¹ Furthermore, for Langdell "justice and convenience were relevant ... only insofar as they were embodied in principles—abstract yet precise norms that were consistent with the other fundamental principles of the system. To let considerations of acceptability directly justify a bottom-level rule or individual decision would violate the requirement of conceptual order, on which the universal formality and completeness of the system depended."¹⁶² In this way, Grey qualified the traditional Holmesian contention that Langdell totally neglected justice or policy, but Grey concluded that Langdell's attention to acceptability is limited and purely abstract. As a result, justice and policy still remain irrelevant for Langdell, by Grey's analysis, because they do not directly inform "a bottom-level rule or individual decision."

Grey's "celebrated"¹⁶³ revision did not fundamentally alter the Holmesian conclusion that Langdell viewed justice and policy as "irrelevant" to deciding cases, a view that is said to be "startling."¹⁶⁴ Yet, even if Langdell treated justice and policy as "irrelevant," this view was justified in at least three respects for a prudent lawyer and law professor in the 1870s. First, "commercial law was a field for which businessmen saw the value of uniform rules." From the middle of the eighteenth century, "the domain of contract law had expanded to include most of the universe of economic transactions." Businessmen "stayed out of court" whenever possible and believed that "no special, personal factors should influence the rational calculus" of the marketplace.¹⁶⁵ When forced into court, merchants and members of the growing commercial and industrial interests demanded that cases be conducted "by trained judges, under standardized procedures, and governed by known precedents," rather than by untrained justices seeking to do justice.¹⁶⁶ Far from indicating affection for elegentia juris "in some Platonic sense,"¹⁶⁷ Langdell's "irrelevant" remark reflected both conventional wisdom of a powerful constituency and hardheaded advice derived from his fifteen years of practice on Wall Street.

More generally, Langdell's "irrelevant" remark reflected the fact that appeals to acceptability in court were ineffective and unwise, since contemporary judges "were firm adherents of the doctrine" that "doing justice was not the job of the court if precedent demanded injustice." Early in the 1800s, leading American jurisdictions endorsed this doctrine.¹⁶⁸ Through the 1850s, it remained "an old and deep-rooted principle of the common law, and though it sometimes has the appearance of harshness, it would be difficult to contend against it on principle," according to Parsons.¹⁶⁹ In 1879 Anson did not consider acceptability in dismissing a view, supported by "neither principle nor authority," regarding revocations of offer, closely related to the mailbox dilemma.¹⁷⁰ Thus, nineteenth-century legal scholars and jurists customarily invoked the distinction between moral obligation and legal obligation in analyzing specific cases.¹⁷¹

Finally, Langdell's "irrelevant" remark may reflect the distinction between law and equity. Langdell devoted far more attention to equity than common law in his legal practice, teaching, and scholarship; and a separate body of case law about contracts had arisen in equity,¹⁷² which looked, in theory, to acceptability and was empowered with discretion to declare remedies. For example, addressing breaches of conditions in the Summary on Contracts, Langdell explained that "the rule in equity differs from the rule at law.... Equity can give relief on such conditions as it sees fit to impose.... "¹⁷³ Some remedies were conventionally taught in a course by that name, while equitable remedies, such as specific performance, were usually taught in a course on equity.¹⁷⁴

In sum, there are at least three respects in which Langdell's "irrelevant" remark expressed a well-established, prudent course for a lawyer in the 1870s. The distinction between law and acceptability was preferred by parties to commercial contracts, was commonly endorsed by courts in leading jurisdictions, and reflected the traditional distinction between law and equity. These three jurisprudential justifications are strengthened by the pedagogical nature of Langdell's remarks. In the 1870s Langdell's "irrelevant" remark expressed sound and practical doctrine for a law professor to convey to novice students.

By the same token, Holmes's own analysis of the mailbox dilemma scarcely attended to acceptability, confining himself to a single sentence that, "if convenience preponderates in favor of either view, that is sufficient reason for its adoption." Nor did Holmes attend to case law. In fact, Holmes devoted the bulk of his discussion to "the merely logical grounds" of principle, rebutting Langdell's "most ingenious argument."¹⁷⁵ On this issue as elsewhere in The Common Law, Holmes "may have called for the replacement of 'logic' with evolutionary history, but he was not particularly inclined to practice evolutionary history as a methodology."¹⁷⁶

Rather, it was Langdell who analyzed acceptability, beginning with the sentence quoted by Holmes: "It has been claimed that the purposes of substantial justice, and the interests of the contracting parties as understood by themselves, will be best served by holding that the contract is complete the moment the letter of acceptance is mailed; and cases have been put to show that the contrary view would produce not only unjust but absurd results. The true answer to this argument is, that it is irrelevant; but ..."¹⁷⁷ In the underscored words, Langdell dismissed considerations of fairness and convenience, respectively.

Holmes stopped analyzing Langdell's text at the "but," while Langdell proceeded to consider hypothetically what he had just dismissed: " ... but, assuming it to be relevant, it may be turned against those who use it without losing any of its strength. The only cases of real hardship are where there is a miscarriage of the letter of acceptance, and in those cases a hardship to one of the parties is inevitable."¹⁷⁸ In other words, the appeal to acceptability is equivocal and indeterminate.

Among "those who use" the appeal, Anson likely stood foremost in Langdell's mind. Regarding the mailbox dilemma, Anson concurred with Adams v. Lindsell while also invoking both fairness and convenience. Anson held that offerees would unfairly "be exposed to serious loss" if they relied on a contract that they had accepted by letter that was later determined not binding because the letter did not reach the offeror. In addition, if the offeree had to wait to act on the contract until confirming receipt of the mailed acceptance, that delay would not "conduce to the conduct of business."¹⁷⁹ Thus, Anson in 1879 addressed acceptability, but only from the offeree's perspective.

Langdell's appreciation of indeterminacy arose from considering the offeror's perspective, as well: "Adopting one view, the hardship consists in making one liable on a contract in which he is ignorant of having made; adopting the other view, it consists of depriving one of the benefits of a contract which he supposes he had made." Hence, for either resolution of the mailbox dilemma, "a hardship to one of the parties is inevitable."¹⁸⁰ Langdell's analysis was therefore more comprehensive than Anson, who subsequently acknowledged the importance of treating the perspectives of both parties in the 1887 revision of his treatise.¹⁸¹ Holmes in The Common Law also implicitly conceded Langdell's point by sidestepping acceptability in the single sentence: "if convenience preponderates in favor of either view, that is sufficient reason for its adoption."¹⁸²

Then Langdell asserted that acceptability is, in fact, determinate and that fairness comports with the decision in McCulloch. Between "making one liable on a contract in which he is ignorant of having made" and "depriving one of the benefit of a contract which he supposes he had made, ... the choice would seem to be clear: the former [Adams rule] is positive, the latter [McCulloch rule] merely negative; the former imposes a liability to which no limit can be placed, the latter leaves everything in statu quo."¹⁸³ Lastly, Langdell ended his analysis by considering convenience or efficacy, again from both perspectives. "As to making provision for the contingency of the miscarriage of a letter, this is easy for the person who sends it," that is, the offeree. But "it is practically impossible for the person to whom it is sent," the offeror.¹⁸⁴ Consequently, convenience also favors the rule of McCulloch that the contract is not binding until the offeror receives the acceptance.

Therefore, far from ignoring acceptability, Langdell proposed several conflicting positions. He declared acceptability irrelevant, considered it anyway, showed it to be indeterminate, considered fairness with respect to both parties, examined convenience with respect to both parties, and concluded that justice and convenience favor the resolution that he had previously announced through an analysis of case law and then of principle. Compared to other leading contemporaries, Langdell's seven-page assessment of the mailbox dilemma was more comprehensive and thorough than either Anson's one-sided analysis or Holmes's narrow discussion of principle. Only Pollock's treatment approached Langdell's in compass and sophistication and likewise fell into contradiction, favoring one view on the grounds of acceptability, which he declared to be relevant, and another based on authority, which he endorsed.¹⁸⁵

The mailbox dilemma seemed no more tractable for Pollock than for Langdell, who also had to contend with McCulloch. Langdell's seven-page analysis was, in fact, the most comprehensive and thorough discussion of authority, principle, and acceptability on the mailbox dilemma appearing in the treatise literature to that point. Langdell's failing lay in expressing contradictory views and failing to explain his method of relating authority, principle, and acceptability. This contradiction and failure are apparent when Langdell addressed other topics, even as he repeatedly attended to acceptability.

VI. Langdell's Mode of Legal Reasoning

Apart from the discussion of the mailbox dilemma, Langdell's Summary of Contracts is studded with consideration of acceptability in regard to "a bottom-level rule or individual decision."¹⁸⁶ For example, Langdell stated that the law adopts fictions "to promote justice, i.e., in order to prevent some injustice or some inconvenience which would otherwise arise." Langdell here invoked acceptability specifically in regard to the "doctrine of relation," permitting the legal backdating of a transaction. Under this doctrine, Langdell specified bottom-level rules that are justified "to prevent some injustice or some inconvenience": "that every acceptance of an offer relates back to the time when the offer was first made," that "the ratification of a contract or conveyance made by an agent without sufficient authority" relates to the time of the making, that "the enrollment of a deed of bargain and sale" relates back to the time of the transaction, and that "a parol contract rendered invalid by the Statute of Frauds ... afterwards complied with by a memorandum in writing" relates back to the time of the original acceptance.¹⁸⁷ These are bottom-level rules, which Langdell justified by appeal to acceptability.

Another instance concerns the doctrine that "mental acts or acts of the will are not the materials out of which promises are made; a physical act on the part of the promisor is indispensable; and when the required physical act has been done, only a physical act can undo it." Exceptions are allowed, Langdell observed, "for purposes of justice and convenience," such as that promises signified by physical acts can be obviated when coerced, and that such promises can be terminated when actual consent would be impossible, as in the case of "the death or insanity of an offeror during the pendency of his offer." In addition to these bottom-level rules, Langdell cited examples from specific cases.¹⁸⁸

Third, Langdell explained that where contractual covenants are to be performed on the same day, the law presumes that the promises "are to be performed at the same moment, and concurrently" as a way "of avoiding these opposing [practical] difficulties, of reconciling the just claims of both parties, and of doing perfect justice to each." This constructive dependency "is founded upon equality, which is justice" and so "is regarded by the law with favor." Here, again, Langdell proceeded in the next two pages to specify the application of this rule of constructive dependency by discussing five conditions and correlated cases from his casebook.¹⁸⁹

Fourth, regarding "mutual promises" serving as consideration for each other, Langdell held that an offer and acceptance will legally be considered simultaneous because this view is not only "rational" but "carries out the intentions of the parties." Langdell deemed such intentions irrelevant regarding the mailbox rule, but here he discussed how this rule of simultaneity applied to a series of cases.¹⁹⁰

Another example is "whenever two mutual acts are incapable of being performed at the same moment, and yet no reason can be given for requiring one to be performed before the other." Langdell explained that the law treats the two acts as "mutually independent" and holds that "each must be performed at the proper time without regard to the performance of the other." Drawing upon a specific decision in his casebook, Langdell justified this rule by invoking convenience. "It would be absurd to say that performance on either side was a condition precedent to performance on the other side," he wrote. "[T]he performance of the plaintiff's covenant to raise the soldiers and bring them to the port, and of the defendant's covenant to find shipping and victuals for them, should be completed as nearly as possible at the same time. Each, therefore, was bound to proceed without waiting for the other."¹⁹¹

In another instance, Langdell noted practical constraints and set forth "one or two rules" appealing to fairness for both the offeree and the offeror in order to explain why the duration of an offer in a unilateral contract should be "less strictly limited by implication" than in a bilateral contract.