Series Number Id: UNKNOWN. Sheet number: part of Sheet 51. Vimy Ridge 1918; Canadian Corps trench and cable route map. "Trenches corrected to 3-5-18." "Field Survey Co R E 5585". Detail, grid and contours grey; all British and German trenches and trench names red (situation fluid). Green and black overprint includes title statement and legend, and shows cable routes in black and green. Neat manuscript additions in green and blue ink., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC18; envelope_number: 561.