Series Number Id: UNKNOWN. Sheet number: Part of Sheet 36. Edition number: 3. Loos-Lens Area; layered trench map, 1917. "Trenches corrected to 2-10-17". "Field Survey Co., R.E. 5101." "Printed by No. 6 Advanced Section A.P.& S.S."
Detail, grid and contours grey; 2 green and 4 brown layer tints. Red stamps in margin: No. 7 Canadian Siege Battery, Oct 15 1917 and Oct 18 1917. Black stamp on reverse: 80th H.A.G. [Heavy Artillery Group], No. R1421/17, Date 14-10-17., Used by Major J. C. Thomson MC, OC 20th Siege Battery, RGA. WW1 Trench Map Collection: Box PC23, Envelope 723.