[Light trench mortar battery trench map]. Sheet number: [36c SW1]. Area: Lens, squares [not shown] M.25.d, 26.a, 32.c, d; S.1.b, d, 2.a, b, c, d; Angres - Bois-en-Hache - Bois 11 sector, the eastern slope of the Lorette Spur north of Souchez and Givenchy-en-Gohelle. Shows German trenches and wire in red, and British trenches and mine craters with names in black, along a front of 1.3 miles. Seven positions of British mortars of 73rd Light Trench Mortar Battery shown, with arcs of fire and directional arrows to Fosse 6 (presumably the aiming point). Signed on face: A.F. Best Lt, 73 L.T.M.B., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC17; envelope_number: 511, Manuscript on reverse: Loos [actually some distance south] Positions, 73rd TM Battery 1917, Lt A F Best, 9th R Sx Regt.