Sir John Harvey 1778-1852
From these heights, Lieutenant-Colonel John Harvey set out with about 700 men on the night of June 5, 1813, to launch a surprise attack on an invading United States force of some 3,000 men camped at Stoney Creek. His rout of the troops commanded by Brigadier-General John Chandler under cover of darkness in the early hours of June 6, is generally credited with saving Upper Canada from being overrun by the enemy. Harvey was knighted in 1824, served as Lieutenant-Governor of New Brunswick, 1834-41, Governor of Newfoundland, 1841-46, and Lieutenant-Governor of Nova Scotia, 1846-51.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.