Series Number Id: GSGS 2746. Sheet number: part of sheet 36. British Expeditionary Force (BEF) area, late 1914. Outline administrative map of parts of Belgium and NE France, covering the front and rear area of the BEF. in late 1914/early 1915. Detail black, water blue., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC22; envelope_number: 686.