Series Number Id: GSGS 2743. Sheet number: 66d. Edition number: 1. Fourth Army enemy's railways and enemy organisation map, 18 August 1918. At head of map: France, 1:40,000. "[5th] Field Survey Co. R.E. (3767) 9-6-18 [crossed out and followed with blue overprint] [5th] Field Survey Bn. R.E. (4171) 18-8-18." Grey detail, contours and squaring. "Enemy Organisation Map" legend, in English and French, in blue overprint., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC22; envelope_number: 693.