Burt, William Austin, 1792-1858, Houghton, Douglass, 1809-1845 (1845). 59N 30W - Survey Map of Eagle Harbor Township, Keweenaw County, page 1 [Michigan]. Department of Natural Resources. https://michigan.access.preservica.com/uncategorized/IO_fe78cf6a-2cd0-4cf8-b625-2e1105a3570e (map)