The Haldimand Grant 1784
Following the American Revolution Sir Frederick Haldimand, Governor-in-Chief of Canada, granted to the Six Nations of the Iroquois a tract of land extending for 10 km on both sides of the Grand River from its source to Lake Erie. This grant was made in recognition of their services as allies of the British Crown during the war and to recompense them for the loss of their former lands in northern New York State. In later years large areas of this tract, including portion of the present counties of Haldimand, Brant, Waterloo and Wellington were sold to white settlers.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.