The "Rule of Last Opportunity" or "Last Clear Chance" is a doctrine related to the defence of contributory negligence. It states that even if the plaintiff was negligent, the defendant will still be held liable if they had the last clear opportunity to avoid the accident despite the plaintiff's negligence. This rule was established in the English case of Davies v. Mann (1842). In that case, the plaintiff had negligently left his donkey fettered on a highway, and the defendant, driving his wagon too fast, ran over and killed it. The defendant was held liable because he had the last opportunity to avoid the accident.