Series Number Id: GSGS 3439. Sheet number: part of sheet 51. Battle of Arras preparation; trench, target and hostile battery map. "3rd Field Survey Co. (1405)". "Ordnance Survey, February, 1917." Grey base map; German trenches and names red; British trenches to depth of 300 yards blue. Overprint in dark blue-purple: "Artillery" [target and hostile battery reference], with artillery details. Overprint in green: [Enemy Organisation] Reference, showing railways, roads and tracks chiefly used, and more., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC21; envelope_number: 670.
Series Number Id: UNKNOWN. Sheet number: parts of squares 51b NW & NE. Edition number: 6J. Battle of Arras, artillery intelligence: trench, artillery, situation and target map. "Special sheet." "Detail and trenches revised to 12-5-17" in red. Grey base map. Green overprint: [Enemy] Organisation. Blue overprint: approximate British Front Line; artillery details., WW1 Trench Map Collection: Box PC26, Envelope 776.
Series Number Id: UNKNOWN. Sheet number: Part of Sheet 36. Auchy-Loos Area; trench map, harassing fire and hostile batteries map, 1917. "Trenches corrected to 28-6-17". "1st Field Survey Co., R.E. 2363 [numbers crossed out and replaced with blue overprint] 2364". Grey base map; German trenches and names red; British trenches and names to depth of 600 yards blue. "Map for Harassing Fire, Reference" in blue, as well as dumps, air lines, lamp signalling stations, OPs, HQs or signal stations, railways, telephone exchanges, and trench mortars. In yellow: roads in use, tracks, and centres of activity. In black: active battery positions since June 15th, positions not reported active, AA guns and zone call markings., WW1 Trench Map Collection: Box PC18, Envelope 558.
Series Number Id: UNKNOWN. Sheet number: part of sheet 51. Edition number: 1a (local). At head of map: parts of 51c S.E., 51b S.W., 57d N.E., and 57c N.W. "Special sheet". Trench map and enemy battery positions map. British trenches in red; German trenches in blue. "Trenches revised from information received to 15-8-18". "Enemy organisation 15-8-18". "Artillery, 17-8-18." British front pecked black; zone call areas black., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC18; envelope_number: 554.
Series Number Id: UNKNOWN. Sheet number: parts of squares 51b NW, NE and SW, SE. Edition number: 6J. Battle of Arras, artillery intelligence: trench, artillery, situation and target map. "Special sheet." "Detail and trenches revised to 12-5-17" in red. "3rd Field Survey Co., R.E. (1566)". Grey base map. Green overprint: [Enemy] Organisation. Blue overprint: approximate British Front Line; artillery details., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC21; envelope_number: 671.
Series Number Id: UNKNOWN. Sheet number: Part of Sheet 36. Festubert-Loos Area, trench map, enemy battery positions and target map. "Trenches corrected to 12-6-18". "Field Survey Co R.E. 5781 [numbers crossed out with black overprint and replaced with] 6405." Detail, grid and contours grey; British and German trenches and names red. In dark blue: [enemy battery] positions occupied and positions unoccupied, between 1-5-18 and 3-6-18; shows field and unknown calibre, and heavy batteries. In light blue: roads and tracks. In black: areas of activity, railways, light railways and tramways in use, dumps and headquarters. "This map is intended to serve as a guide in selecting targets for artillery and machine gun harassing fire. Current photographs should be consulted for details of work in progress.", WW1 Trench Map Collection: Box PC22, Envelope 678.
Series Number Id: UNKNOWN. Sheet number: part of sheet 36. "Trenches corrected to 9-2-18." "Field Survey Co., R.E. 5781 [number crossed out and replaced with blue overprint] 5810". Detail, grid and contours grey; red pecked British front line, and German trenches and trench names. Overprint in dark blue: Positions Map, positions active and positions inactive between 1-1-18 & 7-2-18., Used by Major J. C. Thomson, OC 20th Siege Battery. WW1 Trench Map Collection: Box PC14, Envelope 390.
Series Number Id: UNKNOWN. Sheet number: part of Sheet 51. East of Vimy Ridge. "[Enemy Battery] positions map" in black overprint with numbered notes. "Trenches corrected to 6-7-17" in red overprint. Detail, grid and contours grey; German trenches and names red; British trenches to depth of 700 yards and names blue; German battery positions and zone call areas black. Used by Major J. C. Thomson, OC 20th Siege Battery., Manuscript on reverse: H[ostile] B[atteries]. GLOSTER WOOD. Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC20; envelope_number: 643.
Series Number Id: UNKNOWN. Sheet number: parts of 51b SW, SE, & 57c NW, NE. Edition number: 4d. Trench map and enemy battery positions map. "Special sheet." "Detail and trenches corrected to 26-8-17." "Field Survey Co., R.E. (10027)." Detail, contours and grid grey; woods green; trenches in red; zone call markings in blue; approximate British front line 4-9-17 in blue., WW1 Trench Map Collection: Box PC27, Envelope 783.
Series Number Id: UNKNOWN. Sheet number: part of sheet 36. Edition number: 2. "Trenches corrected to 18-5-18." "This map is intended to serve as a guide in selecting targets for artillery and machine gun harassing fire. Current photographs should be consulted for details of work in progress." Grey base map; overprint in red, black and dark blue. [Enemy Battery] positions occupied, and positions unoccupied, between 1-5-18 and 3-6-18. Shows field and unknown calibre, and heavy batteries. Roads and tracks in light blue. Areas of activity, railways, light railways, tramways in use, dumps and HQs in black., "Field Survey Co., R.E. 6289 [number crossed out and replaced with black overprint] 6371.", WW1 Trench Map Collection: Box PC22, Envelope 679.
Series Number Id: UNKNOWN. Sheet number: Part of Sheet 36. Edition number: 3. Loos-Lens Area; trench, counter-battery and enemy organisation map, 1917. "Trenches corrected to 2-10-17". "Field Survey Co., R.E. 5101 [numbers crossed out and replaced with green overprint] 5179". Detail, grid and contours grey; British trenches and trench names to a depth of 1000 yards blue; German trenches and trench names red; enemy organisation green. [Enemy battery] positions active and positions inactive, between 20-9-17 and 7-10-17, shown in black. Red stamp in margin: No. 7 Canadian Siege Battery, Oct 15 1917., Used by Major J.C. Thomson MC, OC 20th Siege Battery. WW1 Trench Map Collection: Box PC23, Envelope 717.
Series Number Id: UNKNOWN. Sheet number: Part of Sheet 36. Edition number: 5. Mid-1918 Loos-Lens Area; trench and artillery harassing fire map. "Trenches corrected to 1.7.18." "Field Survey Co., R.E. 5642 (numbers crossed out and replaced with blue overprint) 6509." In blue overprint, "This map is intended to serve as a guide in selecting targets for artillery and machine gun harassing fire. Current photographs should be consulted for details of work in progress."
Grey base map; trenches in red overprint; blue overprint includes Harrassing Fire Map Reference, which includes roads, centres of activity, and dumps. In dark blue overprint: positions occupied and unoccupied between 23-5-18 and 5-7-18; also zone calls for artillery-air cooperation, and floods., WW1 Trench Map Collection: Box PC27, Envelope 788.
Series Number Id: UNKNOWN. Sheet number: part of sheet 57. Edition number: 2c. At head of map: parts of 57c N.W. N.E., & S.W. S.E. Trench map and enemy battery postions map, Cambrai Battlefield. "Detail and trenches revised to 18-7-17." "3rd Field Survey Co., R.E. (1843)". Detail, contours and grid grey; woods in green; legend in blue. Trenches in red. "Approximate British Front Line 27-7-17" in blue; zone call markings in blue., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC21; envelope_number: 667.
Series Number Id: UNKNOWN. Sheet number: part of sheet 36. "Trenches corrected to 10-7-17". Grey base map; German trenches and names red; British trenches and names to depth of 300-500 yards blue. Dumps, lamp signalling stations, OPs, HQs or signal stations, telephone exchanges, and tramways in blue. Tracks and roads in use, and centres of activity in yellow. Active battery positions since 15th June 1917, positions not reported active since June 15th, AA guns and zone call markings in black., "1st Field Survey Co., R.E. 2365 [number crossed out and replaced with blue overprint] 2461" [Harassing Fire Map]. WW1 Trench Map Collection: Box PC18, Envelope 557.
Series Number Id: GSGS 3491. Sheet number: 3. Messines - Wytschaete Ridge, trench map and hostile battery map, May 1917. "2nd F.S.C. 2004 17-5-17". "Ordnance Survey, March, 1917." Detail and grid grey; water blue; German trenches red; "Hostile Battery Positions with Zone Call Numbers, dated May 15th" in black overprint. One of the artillery intelligence maps produced by Second Army before the Messines battle of June 1917, pinpointing the German batteries located by flash-spotting, sound-ranging, RFC, RA, etc., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC20; envelope_number: 639.
Series Number Id: GSGS 3156. Sheet number: 36, 52, 57. Edition number: 2. Third Army artillery intelligence map, 1917. In red overprint, "[Printed] by No. 3 Advanced Section A.P.& S.S." "Ordnance Survey, March, 1917." Grey and blue base map; overprint in red and blue. Group areas contain number of guns in each. Front Line after Battle of Arras shown in blue. Covers whole Third Army area from Vermelles in north to Epehy in south, and Doullens in west to Cambrai in east. Manuscript on verso: J. Haworth SLIM. 'D' Coy., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC16; envelope_number: 463.
Series Number Id: UNKNOWN. Sheet number: part of sheet 36. Enemy battery positions April 1918. "Field Survey Co., R.E. 6162 [number crossed out and replaced with blue overprint] 6176." "The portion 36a S.E.4 is from a recent survey, the co-ordinates of points in this area differ from those of the regular series sheets." Detail, grid and contours grey; overprint blue. [Enemy Battery] Positions Map, positions active, and positions inactive, between 9-4-18 & 27-4-18. Trenches to 27th April 1918. La Bassee Canal, railways and zone call areas in blue., Manuscript in blue crayon on reverse: O.C. 20 S.B. [Siege Battery]. WW1 Trench Map Collection: Box PC23, Envelope 716.