Third Army administrative map : Third Army traffic map, June 1918
Series Number Id: [GSGS 2364]. Sheet number: part of sheet 36. In upper left margin, "France 1:100,000." In upper right margin, "Parts of Abbeville and Lens 11". "Ordnance Survey (O.B.) [Overseas Branch] June, 1918." Grey detail with black overprint. "10,048" in manuscript in bottom margin [supplies the 3rd Field Survey Co. serial number]. Manuscript on reverse: From GHQ 11-7-18., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC20; envelope_number: 638.