Under the Militia Act of 1855, The Canadian provinces of Upper Canada (now Ontario), and Lower Canada, (now Quebec) were equiped with modern weapons. After consideration, The Colt revolver, model 1851 was adopted in lieu of the traditional pistol for the cavalry. In 1855, 400 revolvers were ordered from the Ordnance department, and a further 400 were ordered in 1856. All were obtained in England through the London firm of Hebbert and Company. All were proofed at the Tower before shipment to Canada.
In Canada the revolvers were marked on the left side of the grip; On top were the initial U-C, for Upper Canada, or L-C for Lower Canada. Below that was the initial of the Troop, A to E for Lower Canada, and A to L for Upper Canada. On the bottom was the individual pistol number within the Troop, from 1 to 50.
These revolvers were still in service throughout the 1870 Riel Rebellion in Manitoba, and only replaced, on an emergency basis, in 1885 by the Colt model of 1878, for the Northwest Rebellion. Thus Canada began to procur its own arms. We did adopt the Peabody and Spencer in the timeframe of 1867 1868.
CANADIAN MILITARY HANDGUNS 1855-1985 by Clive M. Law, 1994 Museum restoration Service, ISBN 0-88855-008-1