Series Number Id: GSGS 2742; Sheet number: 57d SE; Edition number: 2d, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC12; envelope_number: 311, Manuscript markings on face (for 8th October 1916): new trenches with names in area Thiepval - Grandcourt - Miramount - Courcelette - Pozieres; Operations markings in Albert - Ovillers - Pozieres - Courcelette area; also new light railways, and huts in area north and west of Albert; positions marked of 39th, 25th and 18th Divisions (for Battle of Ancre heights - 21st October 1916).