Spencer B. Beebe, President, Conservation International, Portland, Oregon, to Eliot Porter. July 9, 1987.

George Denise, Sierra Club Books, San Francisco, California, to Eliot Porter. December 5, 1973.

Eliot Porter, Santa Fe, New Mexico, to Clifford Rudden, Controller, Sierra Club. February 15, 1969.

Anne Dirkes Kobor, National Geographic Society, Washington, D.C., to Eliot Porter. July 18, 1962.

Ashley Boren, The Nature Conservancy International Program, Washington, D.C., to Eliot Porter. May 18, 1984.

Eliot Porter, Santa Fe, New Mexico, to The Editor, Peoples Column, Albuquerque Journal. December 20, 1973.

Muriel Clarke, Time-Life Books, New York, New York, to Eliot Porter. November 26, 1973.

Bill and Martha Mitchell, Passavant Memorial Area Hospital Association, Jacksonville, Illinois, to Eliot Porter. September 2, 1975.

Frederick F. and Bonia B. Ellis, Santa Fe, New Mexico, to Eliot Porter. February 22, 1972.

Thomas Lindfor, Photo Editor, Curriculum Innovations, Inc., Highwood, Illinois, to Eliot Porter. July 11, 1979.

Lee King, Alpine Associates Nature & Wildlife Photography, Portland, Oregon, to Eliot Porter. April 23, 1972.

Spencer Beebe, Yale Forest School, New Haven, Connecticut, to Eliot Porter. March 12, 1974.

William A. Turnage, Executive Director, The Wilderness Society, Washington, D.C., to Eliot Porter. June 6, 1979.

Michael Berger, Director, Michael Berger Gallery, Pittsburgh, Pennsylvania, to Eliot Porter. May 10, 1976.

Marshall Townsend, Director, The University of Arizona Press, Tucson, Arizona, to Eliot Porter. April 21, 1971.

Clifford J. Rudden, Controller, Sierra Club, San Francisco, California, to Eliot Porter. August 2, 1968.

Allan Porter, Editor, C. J. Bucher, Ltd., Lucerne, Switzerland, to Eliot Porter. May 12, 1966.

Douglas Peck, Production Manager, The University of Arizona Press, Tucson, Arizona, to Eliot Porter. January 14, 1965.

James G. Deane, Editor, The Wilderness Society, Washington, D.C., to Eliot Porter. April 20, 1976.

Michael E. Hoffman, Editor/Publisher, Aperture, Millerton, New York, to Eliot Porter. March 30, 1979.