1768699 Aerial photograph with WWI trenches, 1918 (b/w photo) by English Photographer, (20th century); The Royal Institution, London, UK; (add.info.: Aerial photograph from an album belonging to Nobel Prize-winning physicist William Lawrence Bragg (31 March 1890 ??1 July 1971) showing the beginning of the the Riqueval tunnel on St Quentin\'s canal which runs under the village of Bellicourt, 30 January 1918. The lines of trenches and tracks can be picked out alongside the canal itself, including the trenches of the Hindenberg Line to the top right of the image. The photograph has been marked with an arrow pointing north and a small white cross, possibly related to sound ranging.); 穢 Royal Institution ; English, out of copyright.