Case Facts
The claimant purchased a horse from the defendant for £30. After the sale was completed and the transaction was fully executed, the defendant made a separate promise that the horse was sound and free from vice, and that it did not exceed five years of age. The horse proved to be vicious, restive, ungovernable, and ferocious.
The claimant brought an action in assumpsit. The declaration stated that, in consideration that the claimant had, at the request of the defendant, bought the horse for £30, the defendant had promised that the horse was sound and free from vice. At trial before Wightman J at the Cornwall Spring Assizes in 1841, a verdict was found for the claimant on both issues. The defendant subsequently obtained a rule nisi for arresting judgement on the first count, which related to the warranty of soundness and freedom from vice. It should be noted that the court, determining the matter on this motion in arrest of judgement, necessarily assumed for the purposes of its legal analysis that the promise was express.
Held
The Queen's Bench held that the past and executed consideration of the prior purchase was insufficient to support the defendant's subsequent promise of warranty. The rule for arresting judgement on the first count was made absolute. An express promise cannot be supported by a past and executed consideration that would not raise an implied promise by law; the fact that the promise was express did not extend its legal validity beyond what the consideration was capable of supporting.
Ratio Decidendi
The foundational principle established in this case is that past consideration is no consideration. Where a contract has already been fully executed, the completed transaction cannot provide valid consideration for a new and separate promise made after the fact.
The court articulated the governing principle as follows: the promise must be coextensive with the consideration. The consideration present in this case was the prior purchase of the horse. The only promise that could properly be regarded as coextensive with that consideration would be an obligation to deliver the horse upon request. A warranty of soundness or freedom from vice went substantially beyond what the prior consideration could support. Because the promise of warranty was made after the sale was complete, there was no fresh consideration to sustain it, and it was therefore unenforceable.
This principle sits at the heart of the doctrine of consideration in English contract law. It had been anticipated in Lampleigh v Brathwait (1615), which was cited in argument by counsel, and is directly connected to the broader framework discussed in Re Casey's Patents [1892]. In those cases, the courts recognised that a prior request accompanying a past act could, in certain circumstances, give rise to an enforceable subsequent promise — but the court in this case implicitly confined that line of authority to its recognised exceptions, which were inapplicable on the facts presented.
Obiter Dicta
The judgement contains significant discussion of the exceptions to the general rule that past consideration is insufficient. These exceptions were identified as: first, cases involving voidable contracts that are subsequently ratified; secondly, debts barred by operation of law that are subsequently revived by a new promise; and thirdly, situations involving equitable or moral obligations which, but for some rule of law, would themselves have been sufficient to raise an implied promise.
The court acknowledged that in such exceptional circumstances, a subsequent express promise might be enforceable notwithstanding its apparent grounding in past consideration. The sale of the horse gave rise to no pre-existing equitable obligation, no voidable contract requiring ratification, and no debt barred by statute. The warranty promise accordingly fell outside every recognised exception and could not be enforced.