Aire, parts of Hazebrouck, Tournai, Lens, Valenciennes : map showing German grids
Series Number Id: GSGS 3652. Sheet number: part of sheet 36. "Map showing German grids" in red overprint, [June 1918]. "[1st] Field Survey Co., R.E. 6345" in red overprint. "Ordnance Survey, April, 1918." Detail and squaring grey; water blue., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC23; envelope_number: 707.