1768701 My office at GHQ, 1917-18 (b/w photo) by English Photographer, (20th century); The Royal Institution, London, UK; (add.info.: Photograph in an album belonging to William Lawrence Bragg (31 March 1890 ??1 July 1971), Australian-born British physicist and X-ray crystallographer who, with his father, won the Nobel Prize in Physics in 1915 for his work on X-ray diffraction techniques. The image shows Bragg sitting at his desk in the unit hut (Kemmel Hill), holding a sheaf of papers.); 穢 Royal Institution ; English, out of copyright.