[La Bassée, Loos Region : hostile battery positions]
Description
Series Number Id: GSGS 2742; Sheet number: 44a (36c) NW; Edition number: 11, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC24; envelope_number: 735, Manuscript on reverse: OC 193 S[iege] Bty; not linen backed; some small repairs; from collection of Major J.C. Thomson MC (20th Siege Battery).