To support a war with France in 1353, the staple was reinstated by statute of 1353 after an experiment without it in which profits of a staple went to staples outside the nation. Wool exports were inspected for quality and taxed through his officials only at the designated staple ports. These officials included collectors, controllers, searchers [inspectors], surveyors, clerks, weighers, and crane-keepers. Wool, woolfells, leather, and lead sold for export had to go through the staple town. The penalty was forfeiture of lands, tenements, goods, and chattel. (The staple statute remained basically unchanged for the next 200 years.) The mayor and constables of the staple were elected annually by the native and foreign merchants of the place. The mayor gave validity to contracts for a set fee, by seal of his office. He and the constables had jurisdiction over all persons and things touching the staple, which was regulated by the Law Merchant in all matters of contract, covenant, debt, and felonies against foreign merchants. A hue and cry was required to be raised and followed for anyone taking a cart of merchandise or slaying a merchant, denizen [resident alien] or alien, or the town would answer for the robbery and damage done. In 1363, Calais, a continental town held by the English, became the staple town for lead, tin, cloth, and wool and was placed under a group of London capitalists: the Merchants of the Staple. All exports of these had to pass through Calais, where customs tax was collected. Guns and cannon were common by 1372. In the 1300s and 1400s, the king relied on mercenaries hired directly or by contract with his great nobles for foreign wars. The King reimbursed the contractors with the profits of war, such as the ransoms paid by the families of rich prisoners. The fighting men supplemented their pay by plunder. Featherbeds and blooded horses were favorite spoils of war brought back to England from the continent. As new techniques with footmen came into being, the footmen became the core of the army and the knightly abilities of the feudal tenants-in-chief became less valuable.