Kenneth Froehly to Eliot Porter. August 16, 1971.

Eliot Porter to Jack L. Cross, Director, University of Arizona Press. November 15, 1964.

Marshall Townsend, Director, The University of Arizona Press, Tucson, Arizona, to Eliot Porter. April 27, 1973.

David Hunter McAlpin, Princeton, New Jersey, to Eliot Porter. September 19, 1977.

Nancy Newhall, Rochester, New York, to Eliot Porter. February 3, 1958.

Eliot Porter, Santa Fe, New Mexico, to Eliot Porter. August 7, 1979.

Gary McNair, Albuquerque, New Mexico, to Eliot Porter. March 23, 1977.

Louise Tamotzu, Santa Fe, New Mexico, to Eliot Porter. January 25, 1970.

Bob Rogers, Salt Lake City, Utah, to Eliot Porter. October 5, 1973.

Clifford J. Rudden, Sierra Club, San Francisco, California, to Eliot Porter. August 24, 1971.

Eliot Porter, Santa Fe, New Mexico, to Edgar Wayburn, President, Sierra Club. May 1, 1968.

Eliot Porter, Santa Fe, New Mexico, to Clifford Rudden, Controller, Sierra Club. August 8, 1968.

Richard O. Albert, Alice, Texas, to Eliot Porter. December 29, 1967.

John Branch, South Gate, California, to Eliot Porter. December 6, 1979.

Jon Beckmann, Editor in Chief, Sierra Club, San Francisco, California, to Eliot Porter. August 20, 1975.

Eliot Porter, Santa Fe, New Mexico, to The Editor, The New Mexican. July 2, 1959.

Edgar Wayburn, President, Sierra Club, San Francisco, California, to Eliot Porter. n.d.

Joe Marshall, The University of Arizona, Tucson, Arizona, to Eliot Porter. January 24, 1963.

Eliot Porter to Douglas Peck, Production Manager, The University of Arizona Press. January 16, 1965.

Donald L. Stephens, Jr., Middleton, Wisconsin, to Eliot Porter. October 26, 1979.