The roll contains c 40 acetate, ozalid and tracing paper drawings of mechanical details including clutch setting equipment instructions; Sudan Railways diesel hydraulic locomotives modifcation charts and Metro-Cammell drawings for mechanical arrangements. Also in the roll are two drawing schedules for contract drawings for D.H. shunting locomotive for Sierra Leone Development Co Ltd and contract drawings for Stewarts and Llyods. Drawing number range V3396-3399.