Mary Van Buren King, Santa Fe, New Mexico, to Laura Gilpin. September 3, 1927.

Ira W. Martin, President, Pictorial Photographers of America, New York, New York, to Laura Gilpin. May 16, 1929.

Brenda Putnam, New York, New York, to Laura Gilpin. August [7?], 1928.

Frances N. Osborn, Washington, D. C., to Laura Gilpin. September 21, 1927.

Jane Felix White, New York, New York, to Laura Gilpin. February 15, 1926.

Alice Boughton, New York, New York, to Laura Gilpin. March 21, 1929.

Laura Gilpin, Colorado Springs, Colorado, to Ira W. Martin. July 13, 1929.

Alec [Torkesutar?], Visual Resources for Ornithology, Philadelphia, Pennsylvania, to Eliot Porter. [October] 27, 1982.

George William Eggers, Director, The Denver Art Museum, Denver, Colorado, to Brenda Putnam. December 9, 1925.

Ralph B. Bonwit, Director of Exhibits, Photographic Club of Baltimore City, Baltimore, Maryland, to Laura Gilpin. June 7, 1924.

Antoinette Hervey, New York, New York, to Laura Gilpin. February 3, 1926.

John H. Kane, Phillips Petroleum Company, Bartlesville, Oklahoma, to Laura Gilpin. June 22, 1926.

Deborah Ogden, Friends of the Earth, San Francisco, California, to Eliot Porter. August 11, 1983.

Herbert Putnam, Librarian, Library of Congress, Washington, D. C., to Laura Gilpin. May 24, 1926.

Brenda Putnam, Philadelphia, Pennsylvania, to Laura Gilpin. February 8, 1924.

Laura Gilpin, Colorado Springs, Colorado, to Stella F. Simon. March 15, 1926.

Henwar Rodakiewicz, New York, New York, to Eliot Porter. December 22, 1963.

Robert Wharton, New York, New York, to Eliot Porter. October 18, 1967.

Gordon N. Ray, President, John Simon Guggenheim Memorial Foundation, New York, New York, to Laura Gilpin. September 12, 1973.

Marjorie McPharlin, Santa Fe, New Mexico, to Laura Gilpin. January 4, 1972.