Clarence H. White, II, Director, Clarence H. White School of Photography, New York, New York, to Laura Gilpin. March 4, 1940.

Laura Gilpin, Colorado Springs, Colorado, to Percy Hagerman, President, Colorado Springs Fine Arts Center. April 29, 1940.

Tom Maloney, T. J. Maloney, Inc., New York, New York, to Laura Gilpin. October 29, 1940.

F. Quellmalz, Salon Director, New York World’s Fair of 1940, New York, New York, to Laura Gilpin. March 20, 1940.

Laura Gilpin, Colorado Springs, Colorado, to Mr. Willard D. Morgan, National Educational Alliance. December 13, 1941.

Laura Gilpin, Colorado Springs, Colorado, to Mr. Jean Eschmann, The National Library Bindery Co. of Ohio. May 8, 1940.

J. E. Krantz, The American Platinum Works, Newark, New Jersey, to Laura Gilpin. March 12, 1940.

Tom Maloney, U. S. Camera Publishing Corp., New York, New York, to Laura Gilpin. June 25, 1940.

Wendell A. Morder, Professor of Atmospheric Science, University of Miami, Miami, Florida, to Eliot Porter. August 23, 1971.

John D. Margolis, Associate Professor, Northwestern University , Evanston, Illinois, to Eliot Porter. February 27, 1974.

Dede Armentrout, Regional Representative, National Audubon Society, Brownwood, Texas, to Eliot Porter. December 20, 1979.

Elvis J. Stahr, President, National Audubon Society, New York, New York, to Eliot Porter. January 29, 1975.

Eliot Porter, Winnetka, Illinois, to Henry Allen Moe, Secretary, John Simon Guggenheim Memorial Foundation. December 28, 1945.

Henry Allen Moe, John Simon Guggenheim Memorial Foundation, New York, New York, to Eliot Porter. December 13, 1946.

John D. Margolis, Associate Professor, Northwestern University , Evanston, Illinois, to Eliot Porter. May 6, 1974.

Elvis J. Stahr, President, National Audubon Society, New York, New York, to Eliot Porter. December 12, 1974.

Les Line, Editor, Audubon, New York, New York, to Hugh Nash, Editor, Friends of the Earth. January 25, 1971.

Letter from Jay Tanen, Gallery Director, The K&L Gallery of Photographic Art, New York, New York. February 1, 1978.

John Macrae, III, E. P. Dutton & Co., Inc., New York, New York, to Eliot Porter. February 17, 1969.

Nathan Lyons, Art Director, George Eastman House, Rochester, New York, to Eliot Porter. October 19, 1962.