[Second] Army area map, no. 8 : hostile aerodromes and hospitals, from air photographs, April 1st - May 15th, 1918
Series Number Id: UNKNOWN. Sheet number: parts of sheets 28 and 36. "[4th] Field Survey Coy., R.E., (8845) 16-5-18 [numbers stroked out with green overprint and followed with] (8846) 16-5-18." Grey detail; overprint red and green. Key shows signs for aerodromes and hospitals in red and green. Identifications of German pursuit flights, reconnaissance flights, Army aircraft parks, and more in green. Front Line in red., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC22; envelope_number: 696.