Series Number Id: GSGS 2742; Sheet number: 62c SE; Edition number: 4b (local), Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC09; envelope_number: 246, Trenches to 17th July 1918. OS March 1918, Field Survey Bn. RE (grey), deleted, o/p red: [5th] Field Survey Bn. RE (4158) 18-6-18.