[Ypres, 3rd Battle of : Fifth Army counter-battery map]
Series Number Id: UNKNOWN. Sheet number: part of sheet 28. Edition number: 1. At head of map: C.10-P.12. Black overprint in top margin, "Secret No. 2, Hostile Battery Positions. 14-6-17." "5th Field Survey Coy., R.E. (1068) [numbers crossed out and replaced with black overprint] (1094) 5.6.17." "Trenches corrected from information received up to 6-6-17." German trenches red; enemy batteries black; Zone Call boundaries and letters black. "This Map is diagrammatic. For exact locations the co-ordinates in Hostile Battery Catalogue should be used." Manuscript on reverse: C. E. Hickman [RFA], Zillebeke, 1:20,000., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC15; envelope_number: 411.