The folder contains c 20 tracing paper and waxed linen drawings of layout of equipment in electro-diesel locomotives for British Rail Southern Region and LNER (prototype diesel electric A4, Mallard). General outlines for diesel electric locomotives, trolley mining locomotives, proposed cab arrangement for electric shunting locomotives for Portuguese Railways, New Zealand Railways, Central Argentine Railway, Egyptian State Railways, Iraqi State Railways, Sau Paulo Railway, Western Australia Government Railways, Palestine Railways, RENFE and USSR. Drawing number P13041.