R. L. Nienkamp, Plant Manager, Meisel Photochrome Corporation, Dallas, Texas, to Eliot Porter. June 25, 1974.

Bill Weeks, Director, The University of New Mexico, Albuquerque, New Mexico, to Eliot Porter. March 29, 1973.

Statement of Intent between Eliot Porter and Robert Smith with the Brooks Institute Alumni Association. February 7, 1977.

Nancy Newhall, Acting Curator, The Museum of Modern Art, New York, New York, to Eliot Porter. January 5, 1945.

M. P. Curran, Project Manager, HERO/Palmer Research System, Anaheim, California, to Eliot Porter. August 4, 1976.

Norm Deniston, Assistant Project Manager, HERO/Palmer Research System, Anaheim, California, to Eliot Porter. October 20, 1975.

John Macrae, III, President, E. P. Dutton & Co., Inc., New York, New York, to Timothy Seldes, Russell & Volkening, Inc. December 10, 1976.

Joan Waricha, Rights and Permissions, Scholastic Magazines, Inc., New York, New York, to Eliot Porter. October 12, 1973.

Joan Waricha, Rights and Permissions, Scholastic Magazines, Inc., New York, New York, to Eliot Porter. January 10, 1974.

Les Line, Editor, Audubon, New York, New York, to Eliot Porter. August 15, 1974.

Margot Feely, Productions Manager, The Metropolitan Museum of Art, New York, New York, to Eliot Porter. January 26, 1976.

Ann Guilfoyle, Senior Editor, Audubon, New York, New York, to Eliot Porter. May 3, 1972.

J. Mische, Treasurer, The Adirondack Historical Association, New York, New York, to Eliot Porter. November 5, 1971.

Frank B. Gill, Chairman, Department of Ornithology, The Academy of Natural Sciences, Philadelphia, Pennsylvania, to Eliot Porter. July 20, 1987.

Frank N. McLaughlin, Principal, McLaughlin and Company, Rochester, New York, to Eliot Porter. July 20, 1988.

Adele Auchincloss, Natural Resources Defense Council, New York, New York, to Eliot Porter. September 25, 1987.

Frank N. McLaughlin, Manager, Eastman Kodak Company, Rochester, New York, to Eliot Porter. August 30, 1986.

J. P. Myers, Director, Visual Resources for Ornithology, Philadelphia, Pennsylvania, to Eliot Porter. January 22, 1984.

Thomas Peter Bennett, President, The Academy of Natural Sciences, Philadelphia, Pennsylvania, to Eliot Porter. May 13, 1983.

Edgar Wayburn, Vice President, Sierra Club, San Francisco, California, to Eliot Porter. December 29, 1969.