Burt, William Austin, 1792-1858, Mullett, John, 1786-1862 (1840). 41N 05E - Survey Map of Drummond Island, Chippewa County, page 1 [Michigan]. Department of Natural Resources. https://michigan.access.preservica.com/uncategorized/IO_062ee95c-6b6d-483e-8f7f-1270e491c449 (map)