Papers primarily presented by Mrs. B. W. Snow and Anna Butler, 1906; Anna Butler, 1938; and Mrs. Burr Jones, 1945. The Index Rerum was presented by Henry S. Butler, September 14, 1933. Several items in Box 10 were presented by Mrs. Burr Jones, July 1947. A letter dated Madison, March 29, 1902 by J. D. Butler was presented by Edwin H. Frost, January 31, 1949. Purchased from Mrs. Grace (Woodhead) Zeiss, October 1949, are correspondence of J. D. Butler with John E. Woodhead, dated October 27, 1888 - February 17, 1894, and typed copies of 2 articles written by Butler for Mind in Nature, March 1885 and February 1887; also letters dated August 1869 and February 18, 1888 written by John Muir to Mr. and Mrs. Butler. Four items were presented by Mary Isabel Winslow, Dodge City, Kansas, November 11, 1974.
