This case involved a dispute between the owners of the Connemara, a steamship, and the owners of the Sinclair, a sailing vessel. The Sinclair had been damaged by the Connemara while the two ships were in port. The owners of the Sinclair sued the owners of the Connemara for damages. The Supreme Court held that the owners of the Connemara were liable for the damages caused to the Sinclair. The Court found that the Connemara had been negligent in its operation and that the owners of the Sinclair were entitled to damages. The Court also held that the owners of the Connemara were liable for the costs of repairing the Sinclair. The Court noted that the owners of the Connemara had a duty to exercise reasonable care in the operation of their vessel and that they had failed to do so. The Court also noted that the owners of the Sinclair had acted reasonably in attempting to avoid the collision. The Court concluded that the owners of the Connemara were liable for the damages caused to the Sinclair and that the owners of the Sinclair were entitled to recover the costs of repairing the vessel. The Court also held that the owners of the Connemara were liable for the costs of repairing the Sinclair.

In the case of The Connemara; Sinclair & Another v. Cooper & Others, a majority opinion was issued by the United States Supreme Court that held that an owner of land in Ireland had no standing to bring suit against another party for trespass on their property. However, Justice Field dissented from this ruling and argued that there should be no distinction between foreign and domestic lands when it comes to legal rights. He reasoned that if a person owns land abroad they should have the same right as any other citizen to seek redress for injury or damage done to their property regardless of where it is located. Furthermore, he noted how international law recognizes such rights and thus concluded that those who own real estate outside of U.S borders ought not be deprived of them simply because they are not citizens or residents within its jurisdiction.