University of Bristol - Historical Photographs of China reference number: He01-182. Photo from an album (UoB reference He01) kept in the School of Oriental and African Studies Archives, London (SOAS reference PP MS 82/13). See He01-180, He01-181 and He03-009. See also another print off the same negative in Robert Henry Chandless Photographs: http://digitalcollections.lib.washington.edu/cdm/singleitem/collection/chandless/id/120/rec/96.
Customs men at the Peking Club in 1904
Black and white photograph
Archives & Special Collections, SOAS Library, University of London