The Signal Service in the European War of 1914-1918 (France)
A 1921 official history of the Royal Engineers Signal Service in France during the First World War, written by Raymond Edward Priestley and published in Chatham for a military and general readership. Its pictures are hand-drawn schematic maps of trench lines, signal routes, headquarters and exchange layouts, with dashed and wavy line conventions a designer could adapt for diagrammatic or wartime cartographic graphics.




















