R. & H. Green & Silley Weir mechanical engineers at work in the engine room on board an unknown ship. This is a close-up view inside the crankcase of a diesel motor showing the tops of the bearings marked A1 and F1 and an item with "No. 1 Aft" marked on it is on the left. The location may be any of the docks in the Port of London or in Falmouth.