Series Number Id: GSGS 2742; Sheet number: 57d SE; Edition number: 2a, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC10; envelope_number: 268, Many manuscript markings on face in pencil, apparently for artillery - OPs, targets etc - in area Albert - Thiepval - Ovillers - Contalmaison - Mametz Wood - La Boisselle; very worn in folds; some stains.