Jonathon T. Wright to Eliot Porter. December 5, 1971.

The Nature Conservancy Meeting Agenda and Memorandum. July 6, 1979.

Eliot Porter to Joseph Wood Krutch. August 12, 1953.

[M. Phillips?], Mexico, to Eliot Porter. August 11, 1962.

Joe, Tucson, Arizona, to Eliot Porter. January 31, 1965.

Nancy Newhall to Eliot Porter. April 1, 1948.

Robert Wenkam to Judge Raymond J. Sherwin, President, Sierra Club. June 1, 1971.

Phillips Petroleum Company Performance Campaign Overview. n.d.

Spencer Beebe, Isla Floreana, Galapagos, Ecuador, to Eliot Porter. February 10, 1972.

John Budan, El Paso, Texas, to Eliot Porter. n.d.

Spencer Beebe to Eliot Porter. November 9, 1971.

Winnabelle R. Beasley to Eliot and Aline. April 23, 1973.

Fritz, Carmen, and Fiddi Anglemeyer, Isla Santa Cruz, Galapagos, Ecuador, to Eliot Porter and Family. December, 1968.

Letter from Joyce Freedman, Goddard College, Plainfield, Vermont. February 1.

E. M. Horneman, Santa Cruz, Galapagos, Ecuador, to Eliot Porter. n.d.

[Turia?] Byler to Eliot Porter. April 1, 1960.

Philip J. [Dalabs?] to Eliot Porter. December 15, 1976.

John Branch to Eliot Porter. April 11, 1979.

Dennis Brokaw, San Diego, California, to Eliot Porter. n.d.

Jenny F. Calm, Paris, France, to Eliot Porter. n.d.