Two R. & H. Green & Silley Weir mechanical engineers at work in the engine room on board an unknown ship. They are inside the crankcase of a diesel motor and one is hitting an item marked No. 1 with a sledge hammer while the other is fixing a rope to it. The photographer is standing on the floor plates looking at the men inside the manhole which is in a dirty white painted panel. The location may be any of the docks in the Port of London or in Falmouth.