Lyon, Lucius, 1800-1851A survey map of Fort Gratiot Township and the Northernmost portion of Port Huron Township in St. Clair County, Michigan, measured in 1823.JPEG2000e47940f0-d204-4450-a9e4-009cfc9ef1bbMI-T007N-R017EengDepartment of Natural Resources8888-003Public07N 17E - Survey Map of Fort Gratiot and Port Huron Townships, St. Clair County [Michigan]MapsMichigan--St. ClairT007N-R017E1823