We would first and foremost like to thank NCUR/LANCY for funding this project.

We would also like to thank the numerous others who helped make our research possible:

• Ellen Alers and Tammy Peters, Smithsonian Archives
• Len Bruno, Library of Congress
• Brian Carter-Stiglitz, Institute for Rock Magnetism, University of Minnesota
• Jon Christensen and Mike Hawkins, Iowa DNR
• Daniel Edwins, Northfield, MN
• Dan Engstrom, St. Croix Research Station, Science Museum of Minnesota
• Wayne Feder, Blue Earth, MN
• Rusty Russell and Linda Hollenberg, U.S. National Herbarium
• Rice County Historical Society
• Nat Schaefle, Northfield, MN
• The Sonnabend Family, Amboy, MN
• Edith Walter, Washington, DC
• Judy Wehrspann and staff, Iowa Lakeside Laboratory