Deborah S. Lipman, Photo Librarian, Allyn and Bacon, Inc., Boston, Massachusetts, to Sierra Club. December 17, 1968.

Susan [A.] Smith, Director of Support Services, National Geographic Magazine, Washington, D.C., to Eliot Porter. March 16, 1989.

Carol Cartaino, Editor, Trade Book Division, Prentice, Hall, Inc., Englewood Cliffs, New Jersey, to Laura Gilpin. July 20, 1976.

Mary Sue Walsh, Secretary to Ms. Gilpin, Santa Fe, New Mexico, to Andrea D. Ruben, Assistant to the Curators, Phoenix Art Museum. September 10, 1979.

Susan [A.] Smith, Director of Support Services, National Geographic Magazine, Washington, D.C., to Eliot Porter. December 13, 1988.

Vincent Garroffolo, Guadalupe Gallery, Albuquerque, New Mexico, to Laura Gilpin. June 28, 1947.

John Macrae, III, President, E. P. Dutton & Co., Inc., New York, New York, to Eliot Porter, October 25, 1976.

Mary Barnett Burke, The Hollow Road, Dorset, Vermont, to Clara E. Sipprell. n.d.

Walter E. Scott, Chairman, Madison, Wisconsin, to Eliot Porter. August 12, 1954.

Laura Gilpin, Colorado Springs, Colorado, to Richard O. Boldt. November 26, 1932.

Barbara Spielman, Associate Editor, University of Texas Press, Austin, Texas, to Laura Gilpin. May 3, 1968.

Georgia N. Carr, Houston, Texas, to Laura Gilpin. May 1, 1978.

John Ward, Boulder, Colorado, to Sina Brush-Morales. February 22, 1977.

Floyd D. Robins, Macintosh: Framers and Dealers in Fine Photography, Tucson, Arizona, to Sina Brush-Morales. May 17, 1977.

C. Kuchuk, PIX, Inc., New York, New York, to Laura Gilpin. August 13, 1945.

Paul Thomas Young, Professor of Psychology, University of Illinois, Urbana, Illinois, to Laura Gilpin. November 13, 1951.

Bob Raymond Carlson, Editor, Arizona Highways, Phoenix, Arizona, to Laura Gilpin. January 10, 1950.

W. H. Cowles, The Spokesman Review, Spokane, Washington, to Laura Gilpin. June 21, 1940.

Pendleton Woods, Oklahoma Gas and Electric Company, Oklahoma City, Oklahoma, to Laura Gilpin. May 20, 1969.

Jean S. Tucker, University of Missouri, St. Louis, Missouri, to Carlotta Corpron. January 25, 1980.