Columbia subject headings:
Canada--Politics and government--1841-1867.
Mackenzie, William Lyon, 1795-1861.
Politicians--Canada--Biography.
United States--Politics and government--1845-1861.
Harvard subject headings:
Canada--Politics and government--1841-1867.
Mackenzie, William Lyon, 1795-1861.
Politicians--Canada--Biography
United States--Politics and government--1845-1861.
Princeton subject headings:
Canada--Politics and government--1841-1867.
Mackenzie, William Lyon, 1795-1861.
Politicians--Canada--Biography.
United States--Politics and government--1845-1861.