[Saint-Quentin Canal, Canal de l'Oise à la Sambre, south of Saint-Quentin]
Description
Series Number Id: GSGS 2742; Sheet number: 66c NW; Edition number: 3a, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC10; envelope_number: 277, Manuscript on face: Microphone base of "O" Sound Ranging Section on 15th February 1918; HW at Jussy (5 microphones on straight base).