"In his later years he was consumed with studying Haida art in all its formalistic and cosmological complexity -- taking in structuralist and psychoanalytical insights -- an endeavour which he undertook with his friend the Haida artist Bill Reid but which never resulted in a comprehensive published articulation.His immersion in the Haida thought-world was so total that, as he wrote in the early 1970s, colleagues "are concerned about my sanity and reputation."