Hand-drawn 1920s map of the Rainy Lake watershed in both Minnesota and Ontario, possibly drawn by Ernest Oberholtzer, showing the 14,500 square miles that would have been effected by Edward Backus’ proposed dams. Used with the permission of the Oberholtzer Foundation.

Map of Savanna Portage Trail, 1956. Minnesota Conservation Department, Division of Forestry. A3/0V5, Drawer 7, Folder 8. State Parks Maps and Drawings, Minnesota Division of Parks and Recreation. Government Records Collection, Minnesota Historical Society, St. Paul.

Map of southeastern Minnesota printed in The Paradise of Minnesota: The Proposed Whitewater State Park (L. A. Warming, comp., 1917). Available at the Minnesota Historical Society library as F612.W742 W37 1917.

Map of St. Paul in 1839. Created by Mary Brueggemann. Used with the permission of Gary Brueggemann, in whose book, Minnesota’s First Murder Mystery (Beaver’s Pond Press, 2013), the map originally appeared.