University of Bristol - Historical Photographs of China reference number: Th-n06. John Cornelius Griggs is the maternal grandfather of the mathematician John Griggs Thompson. The man behind Sun Yat-sen (and second from the right in this photograph), is SYS's body guard, Moishe (Morris) 'Two-gun' Cohen (1887-1970). See https://en.wikipedia.org/wiki/Morris_Cohen_(adventurer). See also Fu-n157, Th-n04, Th-n05.
Black and white photograph