In the case of Barney v. Dolph, the Supreme Court of the United States was asked to decide whether a contract between two parties was valid. The contract in question was between William Barney and John Dolph, and it stated that Barney would pay Dolph $1,000 for the purchase of a tract of land. Dolph had previously sold the land to another party, and Barney argued that the contract was invalid because Dolph had no right to sell the land. The Supreme Court held that the contract was valid, and that Dolph had the right to sell the land. The Court reasoned that Dolph had the right to sell the land because he had a valid title to the land, and that the contract was valid because it was made in good faith. The Court also noted that the contract was not voidable because it was not made with the intent to defraud Barney. The Court concluded that the contract was valid and enforceable, and that Barney was entitled to the $1,000 he had paid for the land. The Court also noted that Dolph was not liable for any damages caused by the sale of the land, as he had acted in good faith.

Justice Field delivered the dissenting opinion in Barney v. Dolph, arguing that the majority's decision was contrary to established precedent and would lead to a dangerous expansion of federal power. He argued that Congress had no authority under Article III of the Constitution to pass laws regulating private property rights within a state, as it did with this case involving an Oregon land dispute between two individuals. Furthermore, he noted that such regulation could only be accomplished by passing an amendment to the Constitution or through some other form of legislative action beyond what Congress had done here. In conclusion, Justice Field warned against allowing "the Federal Government [to] invade State jurisdiction" and urged his colleagues not to expand its powers beyond those enumerated in Article III without explicit authorization from either another branch of government or from amendments made directly by citizens themselves.