Series Number Id: GSGS 3151. Sheet number: 37. Secret, Second Army, location of enemy's forces 15 March 1917. At head of map, "Secret", in red overprint along with statement, "Not to be taken into the Trenches." "2nd Field Survey Co., R.E. 1818, 15-3-17" in red overprint. "Ordnance Survey, January, 1917." Grey detail; blue water; red overprint. Front line shown in red, and supposed locations of German Regiments, Divisions, Corps and Armies. Reference to signs for Corps HQs and Division HQs., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC19; envelope_number: 585.
Series Number Id: GSGS 3383. Battle of Arras, enemy order of battle, April 1917. "No. 3 Advanced Section, A.P &S.S." in red overprint. "Ordnance Survey, January 1917." Grey and blue base map; overprint red. Front Line and German divisions and regiments shown on front immediately east of Arras, astride the River Scarpe from Gavrelle in the north, east of Monchy-le-Preux, to Croisilles in the south. Map covers front from Avion in the north to Bazentin-le-Petit in the south, and from west of Arras to east of Cambrai. Manuscript pencil artillery calibration calculations on reverse (indicating issue to battery)., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC20; envelope_number: 636.
Series Number Id: GSGS 2844. Sheet number: part of sheet 62. Fourth Army situation map (enemy order of battle), Dixmude, September 1917. "[4th] Field Survey Coy., R.E. (7543) 16-9-17." "War Office, July, 1917." Grey and blue base map; black overprint. Shows front line, and German divisions in front, reserve, and divisions exhausted during recent fighting, in Fourth Army area from Zeebrugge, Bruges Ostend, Oost Bunkerque in the north to Boesinghe, St Julien and Moorslede in the south., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC20; envelope_number: 637.
Series Number Id: UNKNOWN. Sheet number: parts of sheets 28 and 36. Battle of the Flanders Hills, May 1918. Shows "enemy order of battle, 6 pm, 10th May 1918" in black overprint. "[4th] Field Survey Coy. R.E. 8649 12-4-18 [followed with black overprint] (8803) 10-5-18." Grey base map. Shows Front Line and German Armies, Groups (Corps), Divisions and Regiments from north of Houthulst Forest to south of La Bassée Canal, including all of Second Army Front. Manuscript additions show German thrusts towards Dickebusch Lake and Flanders Hills., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC16; envelope_number: 459.