Sheet number: [28 SW4]. On upper, left margin: Part of sheet 28. On upper, right margin: 2nd Army, sheet 8." "Trenches corrected to Sept. 6th 1915. 1st Printing Co. R.E. 2nd Army Sec. (no. 382)". "O.S.O. 1915." Detail, grid and contours grey; German trenches red; 2-figure coordinates blue., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC16; envelope_number: 441, Manuscript on face: British trenches in blue crayon W of Petit Bois (Wystchaete area). Pencil crosses in Petit Bois area.