Armory v Delamirie [1722] EWHC J94, (1722) 1 Strange 505, is a famous English case on personal property law and finder's rights.

The defendant in the case was Paul de Lamerie, a great producer of silverworks in the 18th century.

The Court held that both Armory and Delamirie had property rights in the jewel, even though neither was the true owner.

The report shows the following text: The plaintiff being a chimney sweeper's boy found a jewel and carried it to the defendant's shop (who was a goldsmith) to know what it was, and delivered it into the hands of the apprentice, who under pretence of weighing it, took out the stones, and calling to the master to let him know it came to three halfpence, the master offered the boy the money, who refused to take it, and insisted to have the thing again; whereupon the apprentice delivered him back the socket without the stones.

That the action well lay against the master, who gives a credit to his apprentice, and is answerable for his neglect, Jones v Hart, Salk 441.