Two circulars stapled together: Railway Executive Committee's "Attack by Hostile Aircraft (Standard Instructions in regard of Working of Trains, Reduction of Lighting, etc.)" issued in July 1918 (5pp), with GER circular "Hostile Aircarft - Supplementary Arrangements to be observed on the Great Eastern Railway in carrying out the Instructions set out in Railway Executive Committee's Circular in regard to attack by Hostile Aircraft dated July, 1918," issued at Liverpool Street in August 1918 (8pp).