Series Number Id: GSGS 2742; Sheet number: 57cNE; Edition number: 5A.
Trenches to 30th May 1917. OS June 1917.
German trenches, fully developed Hindenburg Line and other defences, in red. From collection of Major J.C. Thomson MC (20th Siege Battery).
Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC05; envelope_number: 121.