[First] Army area : secret, First Army ammunition supply system; First Army railways, [January 1918]
Series Number Id: UNKNOWN. Sheet number: part of sheet 36. Edition number: 5. "Secret, First Army ammunition supply system" in red overprint in right margin. "First Army railways" in black overprint in right margin. "[1st] Field Survey Co. R.E. 5643 [numbers crossed out with black overprint and followed with] 5924 [crossed out with red overprint and replaced with] 5925". Grey base map of whole First Army area, from Ploegsteert in the north to Arras in the south, and as far west as Hesdin. "Reference" in right margin includes railway entries in black overprint, and ammunition supply details in red overprint., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC22; envelope_number: 681.