"Congaree Swamp Expedition, April 15-27," 1969 written by John V. Dennis. May 9, 1969.

John G. Mitchell, Editor, Sierra Club, New York, New York, to Eliot Porter. January 11, 1972.

Information about the American Polar Society and The Polar Times. 1978-1979.

Michael A. Luishaw, Mount Sinai Hospital, New York, New York, to Eliot Porter. January 25, 1969.

Charles C. Renshaw, Jr. , Editor, Prism Magazine, Chicago, Illinois, to Eliot Porter. October 31, 1972.

John G. Mitchell, Sierra Club Books, New York, New York, to Eliot Porter. November 10, 1972.

M. Charles Seller, Executive Assistant to the President, Dickinson College, Carlisle, Pennsylvania, to Eliot Porter. May 8, 1979.

Alvin Langdon Coburn, New York, New York, to Kellogg. August 11, 1912.

Helen Fish, The Dayton Museum of Arts, Dayton, Ohio, to Karl Struss. March 17, 1922.

Paul Anderson, East Orange, New Jersey, to Karl Struss. February 15, 1918.

Paul L. Rittenhouse, Little Silver, New Jersey, to Karl Struss. October 15, 1917.

Lucy S. Silke, Board of Education, Chicago, Illinois, to Karl Struss. July 18, 1924.

Doris Kenyon, New York, New York, to Karl Struss. November 23, 1924.

Mervin W. Palmer, New York, New York, to [?] April 10, 1915.

Paul Anderson, East Orange, New Jersey, to Karl Struss. February 5, 1918.

Paul Anderson, East Orange, New Jersey, to Karl Struss. September 17, 1918.

Captain Louis A. Humason to Karl Struss, Hollywood, California. April 8, 1919.

F. K. Ferenz, New York, New York, to Karl Struss. March 20, 1919.

John T. Whatley, Headmaster, St. Mark's School of Texas, Dallas, Texas, to Eliot Porter. November 16, 1971.

Gulielma Fell Alsop, Barnard College, Columbia Unviersity, New York, New York, to Eliot Porter. May 1, 1971.