The fonds consists of biographical material relating to Roderick Haig-Brown, correspondence (1928-1976), manuscripts of prose, articles, speeches, and broadcasts by Haig-Brown and others (circa 1926-1976), as well as clippings of prose, articles, speeches, printed materials, subject files, scrapbooks, and maps. The fonds also includes Haig-Brown's magistrate's notes and notebooks, financial records, and almost one thousand photographic negatives pertaining to Haig-Brown's personal life and research interests. Much of the fonds relates to sport fishing in British Columbia and, more broadly, to the conservation of natural resources. Fonds includes manuscript and printed maps with annotations pertaining to B.C. fisheries and the topography of B.C.