Series Number Id: GSGS 2742; Sheet number: 51b NW; Edition number: 5a, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC10; envelope_number: 271, Manuscript on face: light railways in blue, orange & red inks in area Arras - eastwards to Fampoux; Battle of Arras; manuscript on reverse: J.J. Lovatt RE.