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 and has generated a few sparks. The photographer is standing just behind the hammer. Transparencies numbers PCT3337 to PCT3354 were taken during the same operation.