This comprehensive book on William Lyon Mackenzie's later life focuses first on the period 1838-1849, Mackenzie's years in exile in the United States. It examines his contribution to the American political scene, including his role in writing the constitution of the State of New York. The book also chronicles Mackenzie's life from 1849, when he was granted amnesty and returned to Canada, to his death in 1861. In this, the only comprehensive look at Mackenzie's life, Lillian Gates offers a meticulous account of one of Canada's liveliest nineteenth century politicians.