The series consists of films and footage that depict Tommy and Marion Walker's guiding-outfitting operation at Cold Fish Lake, and the flora, fauna and scenery of the surrounding Spatsizi Plateau. This material documents the operating seasons of 1957 to 1968; events and activities at Cold Fish Lake Camp; the TW Ranch at Hyland Post; packtrains; hunting and fishing trips; the local wildlife; the Walker's annual journeys in and out of the region by horse, floatplane, and automobile; and their winter home at Qualicum Beach on Vancouver Island. Early films were made by Walker as publicity for his guide outfitting business and later films were made to show around the Province in his (eventually successful) attempts to have the Spatzizi designated a park.

The fonds consists of diaries, notebooks, literary papers, business records, subject and correspondence files, photographs, maps and films. The records were created between 1926 and 1989 and document the activities of Tommy and Marion Walker as they operated Tweedsmuir Lodge from 1940 to 1948, ran their big game hunting and guiding business at Cold Fish Lake from 1948 to 1968 and Tommy Walker's advocacy role in promoting the conservation of the Spatsizi area from 1956 to 1989.