Ernesto Barriga-Bonilla, Latin American Field Representative, The Nature Conservancy International Program, Leesburg, Virginia, to Eliot Porter. September 21, 1982.

R. P. Schwenker, Engineering Department, E. I. du Pont de Nemours & Company, Wilmington, Delaware, to Eliot Porter. April 18, 1961.

John Macrae, III, President, E. P. Dutton & Co., Inc., New York, New York, to Eliot Porter. February 11, 1972.

Edmund S. Muskie, Chairman, Subcommittee on Air and Water Pollution, United States Senate, Washington, D.C., to Eliot Porter. July 2, 1971.

Frank N. McLaughlin, Professional and Finishing Markets Division, Eastman Kodak Company, Rochester, New York, to Eliot Porter. November 27, 1978.

Harry L. Parker, President, American Speedlight Corporation, New York, New York, to Eliot Porter, Wildlife Photography. July 28, 1954.

Henry Allen Moe, John Simon Guggenheim Memorial Foundation, New York, New York, to Eliot Porter. April 22, 1946.

Phil Townsend Hanna, Touring Topics, Los Angeles, California, to Karl Struss. May 2, 1925.

Frank Woods, Academy of Motion Picture Arts and Sciences, Hollywood, California, to Karl Struss. May 31, 1927.

Ralph E. Smith, California Camera Club, San Francisco, California, to Karl Struss. June 3, 1929.

Carl Klein, Pictorial Photographers of America, New York, New York, to Karl Struss. May 16, 1929.

Frank Woods, Academy of Motion Picture Arts and Sciences, Hollywood, California, to Karl Struss. June 24, 1927.

Wilfred Buckland, Academy of Motion Picture Arts and Sciences, Hollywood, California, to Karl Struss. June 28, 1927.

Albert Jourdan, Pacific International Salon of Photographic Art, Portland, Oregon, to Karl Struss. March 6, 1930.

Carl Sanchez, Pictorial Photographers of America, New York, New York, to Karl Struss. August 17, 1952.

Peter Bunnell, The Alfred Stieglitz Archive, New Haven, Connecticut, to Karl Struss. June 25, 1962.

David Shepard, Directors Guild of America, Hollywood, California, to Karl Struss. Photocopy. August 2, 1978.

Siegfried R. Weng, The Dayton Art Institute, Dayton, Ohio, to Karl Struss. November 25, 1933.

Spencer B. Beebe, Vice President, Director, The Nature Conservancy International Program, Portland, Oregon, to Eliot Porter. June 11, 1984.

Spencer B. Beebe, Vice President, Director, The Nature Conservancy International Program, Washington, D.C., to Eliot Porter. February 2, 1984.