In the following century, the influence of the Privy Wardrobe and its staff receded and no new Keepers were appointed after 1476. In its place a distinct Office of Ordnance began to establish itself at the Tower, responsible for firearms and artillery and staffed in the 1460s by a Master, a Clerk and a Yeoman.[1] In the 1540s, under Henry VIII, the Ordnance Office was expanded, new officers were appointed and their principal duties clarified.