The Potomac is a Supreme Court case that was decided in 1881. The case involved a dispute between the owners of the Potomac, a steamboat, and the owners of the wharf at which the steamboat was docked. The owners of the wharf claimed that the steamboat had damaged the wharf and was liable for the damages. The Supreme Court held that the steamboat was not liable for the damages because the wharf owners had failed to provide a safe place for the steamboat to dock. The Court reasoned that the wharf owners had a duty to provide a safe place for the steamboat to dock, and that the steamboat was not liable for the damages because the wharf owners had failed to fulfill that duty. The Court also held that the wharf owners were liable for the damages because they had failed to provide a safe place for the steamboat to dock. The Potomac case is an important case because it established the principle that a party has a duty to provide a safe place for another party to dock their vessel. This principle has been applied in numerous cases since the Potomac case was decided. The Potomac case is also important because it established the principle that a party is not liable for damages caused by another party's failure to fulfill their duty. This principle has been applied in numerous cases since the Potomac case was decided.

In The Potomac, the Supreme Court was tasked with determining whether a vessel that had been seized by the United States government for violating its neutrality laws could be released from custody. Justice Field wrote a dissenting opinion in which he argued that while it is true that vessels may be detained and forfeited under certain circumstances, this particular case did not meet those criteria. He noted that there were no facts to support the claim of violation of neutrality laws and thus, no basis for forfeiture or detention. Furthermore, he stated that even if such violations had occurred they would have been committed by individuals rather than the vessel itself; therefore, any penalty should only apply to those responsible parties instead of punishing an innocent ship owner who has done nothing wrong. In conclusion, Justice Field concluded his dissent by stating “The power to seize and detain property on suspicion must never be exercised without clear proof of guilt” as doing so would lead to arbitrary decisions made without due process or proper legal justification.