A close view of a smith forging a large square billet using an heavy duty B & S Massey steam hammer in Number 5 Machine Shop in Chatham Dockyard. The smith, wearing green overalls, is using a pair of tongs to hold the red-hot billet on the hammer base. The hammer's drophead has just made contact with the billet. The photographer is standing just behind the hammer. Transparencies numbers PCT3337 to PCT3354 were taken during the same operation.