William Ross and Henry King were the plaintiffs in error, while James S. Duval and others were the defendants in error. This case concerned a dispute over land that had been granted to William Ross by the United States government under an act of Congress passed on April 24th, 1806. The grant was for two tracts of land located within what is now known as Alabama's Mobile County. In 1837, Duval filed suit against Ross claiming title to one of these tracts based on a Spanish Land Grant issued prior to American sovereignty over this area. At trial, it was determined that although there had been some irregularities with respect to how both grants were obtained from their respective governments, they could not be reconciled due to differences between them; thus making it impossible for either party’s claim of ownership valid or invalid without further evidence being presented at trial which neither side provided sufficient proof thereof . As such ,the Supreme Court found no cause for reversal and affirmed the decision made by lower court ruling in favor of Duval .

In this case, the Supreme Court was asked to decide whether a contract between two parties that had been made in another state but then performed in Virginia could be enforced. The majority opinion held that such contracts were not enforceable under Virginia law and thus should not be recognized by the court. However, Justice McLean dissented from this opinion and argued that it would be unjust for one party to suffer a loss due to an agreement they had entered into with good faith when both parties had intended for it to be binding. He further argued that if the contract was valid where it was formed, then there should have been no reason why its validity could not also extend across state lines so long as all of its terms were fulfilled within those states. Ultimately, he concluded that since both parties had acted in good faith and fully complied with their obligations under the agreement, they should receive equal protection of their rights regardless of which state they happened to reside in at any given time.