Mullett, John, 1786-1862 (1823). 13N 05E - Survey Map of Frankenlust Township and Portsmouth Township, Bay County and Zilwaukee Township, Saginaw County, Page 4 [Michigan]. Department of Natural Resources. https://michigan.access.preservica.com/uncategorized/IO_bf0ba576-5a5c-4e2c-9cb8-c8afce501b32 (map)