Cambridge University Library :- Royal Commonwealth Society Library collections. http://www.lib.cam.ac.uk/deptserv/rcs/
From its foundation in 1868, the organisation known successively as the Colonial Society, Royal Colonial Institute, Royal Empire Society and finally the Royal Commonwealth Society, amassed a library on the British Empire, the Commonwealth and member countries (together with smaller collections on the empires of rival nations) – an astonishing range of books, pamphlets, periodicals, official publications, manuscripts and photographs.