Canadian poet, novelist, children's book author, and translator known for The Fire-Eaters, The Shadow-Maker, Afterworlds, and other works. She received the prestigious Governor General's Award in 1969.
She grew up in Toronto as the daughter of a mentally disturbed and often institutionalized mother and an alcoholic father.
She published her first poem at age seventeen.
She was married twice: first, to poet Milton Acorn, and then to Niko Tsingos, a Greek musician. She died in her forties from complications of alcoholism.
She was honored in "Isis in Darkness," a short story by author Margaret Atwood.