Sir Adam Beck Collegiate and Victorian Hospital. Art therapy With a growing family of three sons, he turned to illustrating books, writing, researching, editing and painting commissioned murals to support them. It was during this time that he became interested in art therapy when he was commissioned to illustrate Lionel Penrose's psychiatric 'M' test. In 1947, while working at Westminster Veterans Hospital in London, he began giving art instruction to some to the psychiatric patients. The positive results of this eventually afforded him the position of Psychiatric Art Therapist. He and his wife Irene were pioneers in the field of Canadian art therapy. His work, and particularly his wife's, led to the development of an art therapy training program at the University of Western Ontario in 1986. Rock art During the 1950s, his ongoing exploration of Northern Ontario introduced him to the ancient native pictographs painted in red ochre on the rocks. A chance meeting with Kenneth E. Kidd, curator of the ethnology department of the Royal Ontario Museum, led to an opportunity to join Kidd and help record the pictograph sites. By 1957, eleven rock-painting sites were recorded in Quetico Provincial Park. Between 1959 and 1965, with two of his sons as field assistants, he discovered and recorded rock art from the foothills of the Rockies to the Atlantic coast. By 1978, he had visited 301 sites in Canada and the U.S. In 1962, the first edition of Indian Rock Paintings of the Great Lakes was published, with Kenneth Kidd as co-author. The Sacred Scrolls Dewdney learned of a secret society within the Ojibway, the Midewiwin, which purportedly embodied traditional ceremonial rituals of healing and sorcery and included four degrees of initiation. It is believed that some essential elements of the Midewiwin, which was first documented by Europeans in the early 18th century, were "elaborations of traditional Anishinaabe beliefs and practices". Elements of this belief system were recorded on scrolls made of birch bark, sewn together with cedar roots. His The Sacred Scrolls of the Southern Ojibway (1975), remains the only volume dedicated exclusively to this subject. Norval Morrisseau In 1960, Dewdney met Norval Morrisseau, a young native artist, and his encouragement and support helped promote Morrisseau as the country's best known Woodland artist. Dewdney edited Morrisseau's book Legends of My People. Dewdney wrote article about him in 1963 and 1965. At one time, Morrisseau and his family lived