1813, Edward Somerset Marquis of Worcester, The Marquis of Worcester's Century of Inventions, page 20:
To make a key of a chamber-door, which to your sight hath its wards and rose-pipe but paper-thick, and yet at pleasure, in a minute of an hour, shall become a perfect pistol, capable to shoot through a breast-plate commonly of carbine-proof, with prime, powder, and firelock, undiscoverable to a stranger's hand.
