The roll contains 13 waxed linen, ozalid, paper and blueprint drawings of brake gear, underframe arrangement, 1600bhp main line locomotive arrangement of superstructure cab framing, bodyside exterior panelling and cab arrangements, body framing for diesel electric railcoach, arrangement of conduit for diesel electric shunting locomotives, and battery locomotive general outline. Drawing numbers P.3227; P3236; P.3242; P.3265 - P.3268; P.3271; P.3500.