United States, Michigan, Mackinac, Mackinac Island
45.8518 -84.6173
Lake shore
sheet - 1
First Geological Survey of Michigan, 1837–1840, Douglass Houghton, State Geologist; Abram Sager, Botanist and Zoologist, 1837; John Wright, State Botanist, 1838, assisted by George H. Bull [Original label in hand of G. Bull] [Coordinates arbitrarily placed at the site of Fort Mackinac]