Houghton, Douglass, 1809-1845A survey map of Manitou Island off the East coast of Grant Township in Keweenaw County, Michigan, measured in 1845.JPEG200056b76f48-84c0-4f05-abe2-eeb6a0da1573MI-T058N-R026WengDepartment of Natural Resources8888-003Public58N 26W - Survey Map of Manitou Island, Grant Township, Keweenaw County [Michigan]MapsMichigan--KeweenawT058N-R026W1845