Lantern slide. Showing the guard at Aswan. This photograph was taken by Sgt. Johnson of the 436 Welsh Field Company c. 1917. It formed part of a lecture which he gave. The notes from his lecture read 'Here we have the Sudanese guard who guard the barrage. They all readily fell in for me to take their photos and naturally expected me to show it to them as soon as I had taken it, but of course that didn't come off.'