Series Number Id: UNKNOWN. Sheet number: part of sheets 62c NE & SE, 62b NW & NE, 62b SW & SE. Edition number: 1a. Storming the Hindenburg Line 1918. "Trenches corrected from information received up to 19-9-18". "Field Survey BN., R.E. (4360) 21-9-18". "Information from captured German maps printed in red." German trenches blue; British trenches red. Situation during the final advance, after the Battle of Havrincourt and Épehy (12-18 September 1918), and before the breaking of the Hindenburg Line and the crossing of the St. Quentin Canal on 28 September. Manuscript on reverse: C.E. Hickman., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC14; envelope_number: 386.