Burt, William Austin, 1792-1858, Mullett, James H. (1840). 41N 01W - Survey Map of Clark Township and Marquette Island, Mackinac County, page 3 [Michigan]. Department of Natural Resources. https://michigan.access.preservica.com/uncategorized/IO_bcd6a6e3-4d56-404a-9a66-9f1fa79004d0 (map)