Davenport v. Lamb et al. was a case heard by the United States Supreme Court in 1871. The case involved a dispute between two parties over the ownership of a piece of land in the state of Mississippi. The plaintiff, Davenport, claimed that he had purchased the land from the defendant, Lamb, and that Lamb had failed to deliver the deed to the property. Lamb argued that he had never sold the land to Davenport and that the deed was invalid. The Supreme Court ultimately sided with Davenport, ruling that Lamb had indeed sold the land to Davenport and that the deed was valid. The Court held that Lamb had made a binding contract with Davenport and that he was obligated to deliver the deed to the property. The Court also held that Davenport had a right to the land and that Lamb was not entitled to any compensation for the sale. The decision in Davenport v. Lamb et al. established the principle that a contract is binding and that a party who fails to fulfill their obligations under the contract is liable for damages. The case also established the principle that a deed is valid and enforceable, even if it is not delivered to the purchaser. This case is still cited today as an example of the importance of contracts and the enforceability of deeds.

In Davenport v. Lamb et al., the Supreme Court was asked to decide whether a state court had jurisdiction over a case involving citizens of different states. The majority opinion held that the state court did have such jurisdiction, but Justice Field dissented from this decision. He argued that under Article III of the Constitution, only federal courts could hear cases between citizens of different states and thus the state court lacked authority in this matter. Furthermore, he noted that Congress had not granted any power to state courts to exercise such jurisdiction and so it should be left up to them alone if they wished to do so or not. Finally, he concluded by stating that allowing individual states' courts to assume such powers would lead down an uncertain path with no clear guidance as how far their authority extended beyond their own borders into other jurisdictions - something which could potentially cause confusion and conflict among all parties involved in interstate disputes.