An excellent bilingual website maintained by the Heritage Project and Histori.ca. In addition to Grey Owl, you will find biographies, lesson plans, and student workbooks for many other extraordinary Canadians, as companion material to 'The Canadians', the History Television series (available free of copyright).
An interesting article on Grey Owl (January 1990), written by Kenneth Brower and reprinted online from the magazine 'Atlantic Monthly'.
A brief biography of Grey Owl, from the online magazine 'Virtual Saskatchewan'.
A longer biography of Grey Owl, prepared by STCVQ (Syndicat des Techniciennes et Techniciens du Cinéma) aka the Quebec Film and Video freelance Technicians Union, who worked on Richard Attenborough's 1999 production of GREY OWL.
A photograph of Grey Owl, from the National Archives of Canada, on Canada's Digital Collections website.
An article by Doug Mackey, of Past Forward Heritage Limited, on Grey Owl - combining oral and local histories from the Temagami, Ontario area.