Professor Howson is married to Margaret Morrison, a Canadian philosopher of science who is also a Professor of Philosophy at the University of Toronto.
Her solo exhibition, Larger Than Life in 2009 at Woodward Gallery, became a visual celebration of life.
Among the artists currently represented and/or held in inventory are Andy Warhol, Robert Indiana, Richard Hambleton, Jean-Michel Basquiat, Keith Haring, Robert Rauschenberg, Sybil Gibson, Cristina Vergano, Margaret Morrison, Susan Breen, Natalie Edgar, Matt Siren, Darkcloud, Kenji Nakayama, Mark Mastroianni, and Rick Begneaud.
Margaret Thatcher | Van Morrison | Margaret Atwood | Toni Morrison | Grant Morrison | Margaret | Jim Morrison | Margaret Mead | Princess Margaret, Countess of Snowdon | Margaret Weis | Princess Margaret | Margaret Cho | Princess Margaret Hospital | Margaret Mitchell | Margaret Bourke-White | Margaret of Anjou | Margaret Court | Margaret Becker | Margaret Sullavan | Margaret Hodge | Jennifer Morrison | Bob and Margaret | Margaret Murray | Morrison & Foerster | Margaret Tudor | Margaret the Virgin | Margaret of York | Margaret of Austria | Margaret Laurence | Margaret Island |