Correspondence and reports of Jackson who authored Mammals of Wisconsin (University of Wisconsin Press, 1961). Correspondence from 1922 to 1958 concerns his book, a series of nature books he edited for Charles C. Thomas, the Society of American Mammalogists and its journal, and the exchange of mammal specimens and of information on mammals in Wisconsin. Included are letters from Aldo Leopold, F. J. W. Schmidt, George Wagner, A. W. Schorger, Francis Zirrer, and Walter E. Scott. Also present are letters, 1928-1932, from several individuals to Dr. E. W. Nelson, Washington, D.C., including two from Theodore Roosevelt (1929); Jackson's possession of these letters is unexplained.
