The River Returns: An Environmental History of the Bow. By Christopher Armstrong, Matthew Evenden and H.V. Nelles. (Montreal /Kingston: McGill-Queen’s University Press, 2009. xi + 488 p., ill., tab., maps, notes, bibl., index. ISBN 978-0-7735-3584-8 49.95$ hc.) - Colpitts, George (Scientia Canadensis)