Vrooman's Battery
Manned by Captain Samuel Hatt's 5th Lincoln (Militia) Regiment and a small party of the Lincoln Militia Artillery under Lieutenant John Ball, and consisting of one 24-pounder cannon mounted within a crescent-shaped earthwork, this Battery was engaged in the Battle of Queenston Heights on the 13th of October, 1812. Commanding the Niagara river, its continuous fire harassed the Americans crossing from Lewiston, provided cover for the British when they were first repulsed from the heights, and supported later attempts to regain them.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.