[Vimy Ridge : front lines, artillery intelligence map 1-1-17]
Series Number Id: GSGS 3267. Sheet number: 36c SW & 51b NW (parts of). Vimy Ridge front lines, artillery intelligence map: enemy battery positions, trench mortars and rear organisation 1-1-17. At head of map: France, sheet 1. "Ordnance Survey, 1916." "3rd Field Survey Coy R.E. (1263)". Detail, grid and contours grey; water blue. Overprinted with pecked purple British front line and pecked yellow ochre German front line. Overprinted in purple: [German battery positions and arcs of fire]; Reference; list of square positions of trench mortars. Purple, green and yellow/ochre plates registered with needles. Overprinted green: military tracks and observation posts. Overprinted yellow/ochre: light railways and supply dumps., WW1 Trench Map Collection: Box PC16, Envelope 437.