 A small American naval vessel arrived to cooperate with an even smaller British naval vessel, HMSV "Experiment", in isolating Windmill Point from reinforcement.During the course of this blockade, a civilian vessel, "United States", commandeered by the Hunters attempted to run the blockade and was fired on by "Experiment".In what may have been the last naval action on the St. Lawrence River, the helmsman of the Patriot Hunter vessel was decapitated by a British cannonball, and the Hunters withdrew into Ogdensburg Harbour, where their vessel was interned.