Cyrus Thomas, 1825-1910
agricultural statistician and entomologist
"The reports of Professor Thomas and Dr. Peale, which are herewith appended, will speak for themselves." --F. V. Hayden. 
- "U.S. Geological Survey Photographic Library," U.S. Geological Survey Photographic Library, 1871, accessed November 21, 2012, photo by W. H. Jackson, http://libraryphoto.cr.usgs.gov/htmlorg/lpb122/land/jwh01673.jpg.
- F. V. Hayden, Preliminary Report of The United States Geological Survey of Montana and Portions of Adjacent Territories; Being A Fifth Annual Report of Progress (Washington: Government Printing Office, 1872), pg. 4.