Series Number Id: GSGS 2743. Sheet number: 57c. Edition number: 2. Fourth Army enemy's railways map, 5 July 1918. At head of map: France, 1:40,000. "[5th] Field Survey Bn. R.E. (3932) 5-7-18" in black overprint. Grey detail and squaring., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC22; envelope_number: 694.