1768677 William Lawrence Bragg and his \'marraine\', July 1916 (b/w photo) by English Photographer, (20th century); The Royal Institution, London, UK; (add.info.: Sir 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. Pictured here driving a military vehicle with his \'marraine\', a term used for a soldier\'s female penfriend. This is possibly Elaine Barran, Bragg\'s first girlfriend.); 穢 Royal Institution ; English, out of copyright.