Edward Steichen, Director of the Department of Photography, The Museum of Modern Art, New York, New York, to Eliot Porter. November 22, 1950.

Susan [A.] Smith, Assistant Director of Photography, National Geographic Society, Washington, D.C., to Estate of Eliot Porter. August 1, 1991.

John H. Adams, Executive Director, Natural Resources Defense Council, New York, New York, to Eliot Porter. October 17, 1985.

Barbara Jellow, Art Director, The University of New Mexico, Albuquerque, New Mexico, to Eleanor Caponigro and Eliot Porter. October 1, 1987.

John Macrae III, Editor-in-Chief, Holt, Rinehart and Winston, New York, New York, to Eliot Porter. June 24, 1983.

John H. Adams, Executive Director, Natural Resources Defense Council, New York, New York, to Eliot Porter. October 22, 1986.

Meeting Minutes by Lloyd P. Fadrique, Secretary, New Mexico Council on Photography, Santa Fe, New Mexico. October 22, 1987.

Adrian W. DeWind, Chairman, Natural Resources Defense Council, Inc., New York, New York, to Eliot Porter. December 27, 1984.

Nika P. Thayer, Secretary to Mr. Steichen, The Museum of Modern Art, New York, New York, to Eliot Porter. June 4, 1959.

Tim [Timothy Seldes], Russell & Volkening, Inc., New York, New York, to Eliot Porter. October 30, 1974.

Tim [Timothy Seldes], Russell & Volkening, Inc., New York, New York, to Eliot Porter. February 13, 1975.

Agreement between Sierra Club and Ballantine Book, Inc. March 5, 1968.

Alfred H. Barr, Jr., Director, The Museum of Modern Art, New York, New York, to Eliot Porter. February 4, 1943.

Grace M. Mayer, Special Assistant to the Director, The Museum of Modern Art, New York, New York, to Eliot Porter. September 28, 1959.

Ann E. Armstrong, Photography Department, The Museum of Modern Art, New York, New York, to Eliot Porter. June 14, 1946.

Nika P. Thayer, Secretary to Mr. Steichen, The Museum of Modern Art, New York, New York, to Eliot Porter. May 9, 1952.

Tim [Timothy Seldes], Russell & Volkening, Inc., New York, New York, to Eliot Porter. January 16, 1978.

Edna Gilpin, Corpus Christi, Texas, to Laura Gilpin. n.d.

Laura Gilpin, Santa Fe, New Mexico, to Ed Hannigan, U. S. Camera. November 16, 1949.

Laura Gilpin, Santa Fe, New Mexico, to Joaquin Ortega, New Mexico Quarterly Review, University of New Mexico. May 27, 1950.