Portfolio of original and blue print general arrangement locomotive drawings from various companies collected by Sir William McAlpine. Most drawings are signed by chief mechanical engineers responsible.

Includes drawings for locomotives from Great Southern Railway (Ireland), Great Southern & Western Railway (Ireland), Grand Trunk Railway (Cananda) Great Northern Railway, Great Eastern Railway, London, Chatham and Dover Railway, Rhodesia Railways (built by North British Locomotive Company), London and North Western Railway, as well as the Para Central De Aragon (Spain) 2-8-2+2-8-2 Garratt locomotive, 4-6-2 Type 10 locomotive for Belgian Railways.