Penguin Random House Canada says Canadian author Graeme Gibson has died at 85.

A co-founder of the Writers’ Trust of Canada and the Writers’ Union of Canada, Gibson also served as president of PEN Canada.

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He was the author of novels including “Five Legs,” “Perpetual Motion” and “Gentleman Death,” and a member of the Order of Canada.

For the past several decades, Gibson lived in Toronto with his partner, author Margaret Atwood.

Atwood said in a statement he was suffering from dementia. She also said he passed away “surrounded by love, friendship and appreciation.”