GSGS (Series) ; 2742. Sheet 28SW. Ed. 5A. Trenches to 1st April 1917. OS April 1917. Belgium & part of France. German trenches red, with blue names; British front & support trenches blue. Situation just before the Battle of Messines, when the Ridge was blown up by 19 huge mines. MS on face: forward & rear microphone bases of 'W' Sound Ranging Section 1917-18. MS on reverse: C.
Series Number Id: GSGS 2742; Sheet number: 28 SW; Edition number: 1, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC04; envelope_number: 100, Manuscript on face relating to water supply, and also front lines 1915-1917.
Series Number Id: GSGS 2742; Sheet number: 28 SW; Edition number: 8a, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC27; envelope_number: 800, Manuscript in margin: Lt. Pierpoint[?] 2/16 LR [London Regiment] To put up huts [NE of Messines].
Series Number Id: GSGS 2742; Sheet number: 36a NE; Edition number: 7a (local), Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC23; envelope_number: 722, Manuscript markings: start line and boundaries for the British advance.
Series Number Id: GSGS 2742; Sheet number: 44a (36c) SE; Edition number: 8a, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC15; envelope_number: 403, Manuscript on markings on face east of Douai; SE corner badly stained on reverse; no printing on reverse.