Series Number Id: UNKNOWN. Sheet number: [5]. Edition number: 3. Ypres Salient, target map, early 1918. "[4th] Field Survey Coy. R.E. (8290) 12-2-18 [numbers crossed out and replaced with red overprint] (8419) 4-3-18 [followed by black overprint] (8630) 6-4-18." "Trenches corrected to 24-2-18." Grey detail with green woods; German trenches and British tracks in red; British trenches, and German tracks and railways blue; approximate British Front Line in blue., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC18; envelope_number: 542.
Series Number Id: UNKNOWN. Sheet number: part of Sheet 28. Edition number: 1A ("A" in red). 3rd Battle of Ypres; trench map and artillery target map, September 1917. "Artillery target map, September 8th, 1917" in blue overprint. "German Trenches corrected to 4-9-17 in red overprint. "[2nd] F.S.Co. 1003 27-8-17 [double-lines in red above number, followed by] 1026 5-9-17 [crossed out with blue overprint and replaced with] 1029 7-9-17." Map detail grey. Approximate British Front line pecked red., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC16; envelope_number: 443.
Series Number Id: UNKNOWN. Sheet number: [5]. Edition number: 3. Ypres Salient, target map, early 1918. "[4th] Field Survey Coy., R.E. (8303) 12-2-18 [numbers crossed out and replaced with black overprint] (8629) 6-4-18". Grey detail with green woods. Coverage: Houthulst Forest, and area west, north and east as far as Clercken and Staden. "Trenches corrected to 10 3 18" in red overprint. German trenches and British tracks in red; British trenches, and German tracks and railways blue; approximate British Front Line in blue., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC18; envelope_number: 541.
Series Number Id: UNKNOWN. Sheet number: part of sheet 57. Edition number: 3. At head of map: O.31-D.24. "Target map" in blue overprint in top margin. "5th Field Survey Co. R.E. (981) 12-5-17 [followed by blue overprint], (1022) 18-5-17." "Trenches corrected from information received up to 13-5-17". "Detail corrected to 10-5-17." Grey detail. Hindenburg Line and other German trenches in red. Reference to buried cable, airline, main routes, other routes and tracks, dumps, important road junctions and defiles. Also shows enemy organisation - HQs, troop deployment, billets, etc. Cancelled marginal stamp: Received in GSGS Map Room 29 July 1922., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC16; envelope_number: 444.
Series Number Id: [GSGS 2742]. 51bNW & 51bNE combined sheet. [1st] FSB 6805, base map: detail & grid grey, water pale blue, contours yellow. O/p red 6874. Trenches corrected to 13th September 1918. British trenches & names in red, German trenches & names in blue. British advanced posts shown thus [large red dots]. British front runs: W of Arleux and Oppy; E of Gavrelle - Greenland Hill; W of Plouvain; E of Pelves. O/p black: 6963 Harassing Map. [Enemy Artillery] Positions considered occupied, unoccupied, 31-8-18. Linen-backed, not printed on reverse. Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC27; envelope_number: 784.