Series Number Id: UNKNOWN. Sheet number: part of sheet 36. Edition number: 2. "Trenches corrected to 18-5-18." "This map is intended to serve as a guide in selecting targets for artillery and machine gun harassing fire. Current photographs should be consulted for details of work in progress." Grey base map; overprint in red, black and dark blue. [Enemy Battery] positions occupied, and positions unoccupied, between 1-5-18 and 3-6-18. Shows field and unknown calibre, and heavy batteries. Roads and tracks in light blue. Areas of activity, railways, light railways, tramways in use, dumps and HQs in black., "Field Survey Co., R.E. 6289 [number crossed out and replaced with black overprint] 6371.", WW1 Trench Map Collection: Box PC22, Envelope 679.