Memorandum from Lewis F. Clark, Clifford J. Rudden, and David Brower, Sierra Club, San Francisco, California. October 20, 1964.

"Strange Coincidences or The Unusual Circumstance Surrounding the Author's Recent Discovery of an Important Lost Audubon Painting." n.d.

Margaretta K. Mitchell, Berkeley, California, to Laura Gilpin. February 14, 1979.

Henry M. Zeller, Conservation Chairman, Sierra Club, to Eliot Porter. August 14, 1968.

Cusie Pfeifer, Marcuse Pfeifer Gallery Photography, New York City, New York, to Carlotta Corpron. June 28, 1979.

[Stuart Gentling], to Bill. July 18, 2003.

John V. N. Dorr to Lillian Gish. September 16, 1954.

Laura Gilpin to Maurice McCabe, The Navajo Tribe. October 28, 1964.

Laura Gilpin to Frank Wardlaw, Director, University of Texas Press. October 31, 1967.

Résumé. After 1978.

List of prints for Rio Grande River of Destiny. November 27, 1967.

Nella [Braddy] Henney, Snowville, New Hampshire, to Lucy, June 27, 1950.

Cornell Capa, The International Fund for Concerned Photography Inc., New York, New York, to Eliot Porter. June 10, 1974.

R. L. Van Oosting, Pictorial Photographers of America, New York, New York, to Karl Struss. May 1, 1932.

Beaumont Newhall, Director, George Eastman House, Rochester, New York, to Eliot Porter. December 20, 1957.

Copy of Bisti Portfolio by David Scheimbaum. n.d.

Suzanne Winckler, to Stuart Gentling. November 13, 2001.

John Beardsley, Adjunct Curator, The Corcoran Gallery of Art, Washington, D.C., to Eliot Porter. August 12, 1987.

Barbara Spielman, Associate Editor, University of Texas Press, Austin, Texas, to Laura Gilpin. February 15, 1968.

Laura Gilpin to Walter Frese, Hastings House. October 9, 1947.