Sheet number: [36cSW2]. "Trenches corrected to 19-10-17". "Field Survey Co., R.E. 5046." Detail, grid and contours grey; canal & floods pecked blue; German trenches & names red; British trenches & names blue. Used by Major J.C. Thomson MC (OC 20th Siege Battery, 8-inch hows)., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC15; envelope_number: 421
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