Burt, William Austin, 1792-1858, Mullett, John, 1786-1862 (1840). 42N 06E - Survey Map of Drummond Island, Chippewa County [Michigan]. Department of Natural Resources. https://michigan.access.preservica.com/uncategorized/IO_5f0477d1-70ab-4004-90cd-017c7df230cd (map)