Brookfield, Noah, Mullett, John, 1786-1862, Sibley, Sylvester (1838). 19N 15W - Survey Map of Sheridan Township, Mason County [Michigan]. Department of Natural Resources. https://michigan.access.preservica.com/uncategorized/IO_b35eac22-a6d6-4422-94c7-def92a9ccc22 (map)