[Ypres Salient 1917-1918, light railways and signals]
Series Number Id: UNKNOWN. Sheet number: Part of Sheet 28. Light railway signals gridded outline photostat map. "Buries etc. in use No.2 L.R.S.S. [Light Railway Signals Section]". Lacking date; probably late-1917/early-1918. Used by No.2 Light Railway Signal Company RE. Manscript black and red reference to light railways and cable routes; water shown blue. Includes a "Christmas Cheere" menu, and a note from the British Museum pinned to the map., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC20; envelope_number: 640.