The Common Law

by Oliver Wendell Holmes

It was characteristic of the German procedure that the defendant could meet that complaint by answering, in an equally general form, that he did not owe the plaintiff. The plaintiff had to do more than simply allege a debt, if he would prevent the defendant from escaping in that way. In England, if the plaintiff had not something to show for his debt, the defendant's denial turned him out of court; and even if he had, he was liable to be defeated by the defendant's swearing with some of his friends to back him that he owed nothing. The chief reason why debt was supplanted for centuries by a later remedy, assumpsit, was the survival of this relic of early days.

Finally, in England as in Germany, debt for the detention of money was the twin brother of the action brought for wrongfully withholding any other kind of chattel. The gist of the complaint in either case was the same.

It seems strange that this crude product of the infancy of law should have any importance for us at the present time. Yet whenever we trace a leading doctrine of substantive law far enough back, we are very likely to find some forgotten circumstance of procedure at its source. Illustrations of this truth have been given already. The action of debt and the other actions of contract will furnish others. Debt throws most light upon the doctrine of consideration.

[253] Our law does not enforce every promise which a man may make. Promises made as ninety-nine promises out of a hundred are, by word of mouth or simple writing, are not binding unless there is a consideration for them. That is, as it is commonly explained, unless the promisee has either conferred a benefit on the promisor, or incurred a detriment, as the inducement to the promise.

It has been thought that this rule was borrowed from Roman law by the Chancery, and, after undergoing some modification there, passed into the common law.

But this account of the matter is at least questionable. So far as the use of words goes, I am not aware that consideration is distinctly called cause before the reign of Elizabeth; in the earlier reports it always appears as quid pro quo. Its first appearance, so far as I know, is in Fleta's account of the action of debt, /1/ and although I am inclined to believe that Fleta's statement is not to be trusted, a careful consideration of the chronological order of the cases in the Year Books will show, I think, that the doctrine was fully developed in debt before any mention of it in equity can be found. One of the earliest [254] references to what a promisor was to have for his undertaking was in the action of assumpsit. /1/ But the doctrine certainly did not originate there. The first mention of consideration in connection with equity which I have seen is in the form of quid pro quo, /2/ and occurs after the requirement had been thoroughly established in debt. /3/

The single fact that a consideration was never required for contracts under seal, unless Fleta is to be trusted against the great weight of nearly contemporaneous evidence, goes far to show that the rule cannot have originated on grounds of policy as a rule of substantive law. And conversely, the coincidence of the doctrine with a peculiar mode of procedure points very strongly to the probability that the peculiar requirement and the peculiar procedure were connected. It will throw light on the question to put together a few undisputed facts, and to consider what consequences naturally followed. It will therefore be desirable to examine the action of debt a little further. But it is only fair to admit, at the outset, that I offer the explanation which follows with great hesitation, and, I think, with a full appreciation of the objections which might be urged.

It was observed a moment ago, that, in order to recover against a defendant who denied his debt, the plaintiff had to show something for it; otherwise he was turned over to the limited jurisdiction of the spiritual tribunals. /4/ This requirement did not mean evidence in the modern sense. It meant simply that he must maintain his cause in one of the ways then recognized by law. These were three, the [255] duel, a writing, and witnesses. The duel need not be discussed, as it soon ceased to be used in debt, and has no bearing on what I have to say. Trial by writing and by witnesses, on the other hand, must both be carefully studied. It will be convenient to consider the latter first and to find out what these witnesses were.

One thing we know at the start; they were not witnesses as we understand the term. They were not produced before a jury for examination and cross-examination, nor did their testimony depend for its effect on being believed by the court that heard it. Nowadays, a case is not decided by the evidence, but by a verdict, or a finding of facts, followed by a judgment. The oath of a witness has no effect unless it is believed. But in the time of Henry II. our trial by jury did not exist. When an oath was allowed to be sworn it had the same effect, whether it was believed or not. There was no provision for sifting it by a second body. In those cases where a trial by witnesses was possible, if the party called on to go forward could find a certain number of men who were willing to swear in a certain form, there was an end of the matter.

Now this seems like a more primitive way of establishing a debt than the production of the defendant's written acknowledgement, and it is material to discover its origin.