Parts of Sheets 57d.SE, 57c.SW, 62d.NE, and 62c.NW. Series: GSGS 3188. Trenches corrected to 2-6-16. Showing the situation before the opening of the Battle of the Somme. The intention was that this map would be printed at 1:10,000 scale, but owing to a mix-up in instructions it was reproduced at 1:20,000. Nevertheless, it proved very popular [source: Lt. Col. M. N. MacLeod, History of 4th FSC/B]. Location: Research Collections, Fonds: WWI Trench Maps France, Box 25, Envelope 750.
Series Number Id: UNKNOWN. Sheet number: parts of 27a NE, 27 NW, 27a SE, 27 SW. Saint-Momelin area, training area near Saint-Omer. "[4th] Field Survey Coy R.E. (8825) 16-5-18." Detail and grid grey. Manuscript in margin: 10/Royal West Kents., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC15; envelope_number: 399.
Series Number Id: UNKNOWN. Sheet number: part of sheet 57. Edition number: 2. At head of map: D.15-L.32. "Trenches corrected from information received up to 10-5-17." "5th Field Survey Co R.E. (980) 11-5-17". Grey detail. Hindenburg Line and other German trenches in red., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC15; envelope_number: 414.
Series Number Id: UNKNOWN. At head of map in red overprint: K.11.-M.23. "Trenches corrected to 27-10-16" in red. "Approximate British Front Line on the morning of 28-10-16" in red. "1st Printing Coy RE 5th Section (374) 26-10-16". German trenches, British front line pecked blue. Cropped regular series sheet. Manuscript on face showing British Line after capture of Beaumont Hamel., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC14; envelope_number: 391.