The Evolution of Ontario's Boundaries - 1840

Following aborted rebellions in both Upper and Lower Canada (1837-1838), the Act of Union (1840) merged the two colonies to form the Province of Canada. Upper and Lower Canada became Canada West and Canada East.

Map scanned from the Economic Atlas of Ontario / Atlas Économique de l'Ontario
W. G. Dean, Editor/ Directeur; G. J. Mathews, Cartographer/ Cartographe
Printed 1969 by University of Toronto Press for the Government of Ontario