Ayres & Others v. Wiswall & Others was a United States Supreme Court case that dealt with the issue of whether a contract between two parties was valid. The case involved a contract between two parties, Ayres and Wiswall, in which Wiswall agreed to pay Ayres a certain amount of money for the sale of a piece of property. Ayres argued that the contract was valid and that Wiswall should be held to its terms. Wiswall, on the other hand, argued that the contract was invalid because it had not been properly executed. The Supreme Court ultimately sided with Ayres, ruling that the contract was valid and that Wiswall should be held to its terms. The Court reasoned that the contract was valid because it had been properly executed and that Wiswall had accepted the terms of the contract. The Court also noted that Wiswall had not raised any objections to the contract at the time of its execution. As such, the Court held that Wiswall was bound by the terms of the contract and that Ayres was entitled to the money that had been agreed upon.

In Ayres & Others v. Wiswall & Others, the Supreme Court was asked to decide whether a contract between two parties should be enforced when it had been made without consideration and in violation of a statute. The majority opinion held that the contract was valid despite these issues because it had been accepted by both parties with full knowledge of its terms. Justice Field dissented from this decision, arguing that contracts which are not supported by consideration or violate statutes should not be enforced as they lack moral obligation and public policy considerations render them voidable at law. He argued that courts must consider all relevant factors before enforcing such agreements, including their legality under state laws and any potential harm caused to third-parties who were unaware of the agreement's existence or content. Furthermore, he noted that allowing such contracts would encourage people to enter into agreements without proper due diligence or understanding of their consequences - something which could lead to significant legal problems down the line for those involved in such transactions