Description: Fort Levis: 1759, Isle Royal (Chimney Island), St. Lawrence River, St. Lawrence County. Determining that Fort La Presentation was not strong enough to defend the St. Lawrence River the French constructed Fort Levis on Isle Royal (Chimney Island) three miles downstream. Named for their commander de Levis it was a four bastioned square, built of wood. Destroyed in three days of bombardment in 1760 by General Amherst it surrendered August 25, 1760. Rebuilt as Fort William Augustus. Some reports indicated the island was obliterated in construction of the St. Lawrence Seaway, however some of the island apparently remains. More information is sought on any remains.