In the 1912 case of MacLeod v. United States, the U.S Supreme Court ruled on a matter concerning maritime law and insurance claims. The plaintiff, MacLeod, was an underwriter who had insured a ship that later sank due to negligence by its crew. He sought to recover his losses from the defendant, United States (as owners of another vessel involved in collision), arguing that they were liable for damages because their ship collided with and damaged the insured vessel before it sank. However, according to general maritime law principles at that time - known as "the doctrine of last clear chance" or "the subsequent negligence rule", liability could be shifted if there was any intervening negligent act after initial fault which became immediate cause of loss/damage. The court held against MacLeod's claim stating that even though US owned-ship did collide with insured vessel causing some damage initially but it didn't directly lead to sinking; instead it was found out through evidence presented during trial proceedings that actual reason behind sinking was gross negligence by crew members who failed in their duty towards proper maintenance & operation post-collision leading eventually into disaster situation where water entered hull causing ship's downfall. Therefore this ruling established precedent emphasizing importance & application scope for 'subsequent negligence rule' within American Maritime Law context while also clarifying legal responsibilities/liabilities associated with marine insurance contracts.

In the dissenting opinion for MacLeod v. United States, Justice Holmes argued that the defendant should not be held liable under a statute he could not reasonably have known applied to his actions. He contended that it was unreasonable to expect an individual in Scotland (where Mr. Macleod resided) to know about and understand U.S law regarding mail fraud, especially given its complexity and frequent changes. Furthermore, he pointed out that even if Mr. Macleod had been aware of the law, there was no evidence suggesting he intended his letters would end up in America or cause harm there - both necessary elements for conviction under this specific statute according to Holmes' interpretation of it.