Personal Details Born 1884 Died 1962 Main nationality USA Profession Linguist Geographer Documentation Publication photo collection tagged "Mongol" in 1925 https://images.hollis.harvard.edu/primo-explore/search?query=any,contains,Mongol&tab=default_tab&search_scope=default_scope&sortby=rank&vid=HVD_IMAGES&facet=searchcreationdate,include,1870%7C,%7C1939&facet=creator,include,Rock,%20Joseph%20Francis%20Charles,%201884-1962,%20American,%20Austrian&lang=en_US&offset=0 Notes His photo collection at Harvard archives has 1,222 photographs. Joseph Francis Charles Rock