Anne Dirkes Kobor, National Geographic Society, Washington, D.C., to Eliot Porter. February 27, 1963.

Anne Dirkes Kobor, National Geographic Society, Washington, D.C., to Eliot Porter. July 22, 1963.

Anne Dirkes Kobor, National Geographic Society, Washington, D.C., to Eliot Porter. April 17, 1963.

Anne Dirkes Kobor, National Geographic Society, Washington, D.C., to Eliot Porter. August 31, 1962.

J. R. Hildebrand, National Geographic Magazine, Washington, D.C., to Eliot Porter. April 25, 1940.

J. R. Hildebrand, National Geographic Magazine, Washington, D.C., to Eliot Porter. May 21, 1940.

John C. Egbert, The Nature Conservancy, Albuquerque, New Mexico, to Eliot Porter. April 12, 1984.

J. R. Hildebrand, National Geographic Magazine, Washington, D.C., to Eliot Porter. September 17, 1940.

Memorandum to the New Mexico Chapter Board of Trustees from John C. Egbert. June 24, 1983.

J. R. Hildebrand, National Geographic Magazine, Washington, D.C., to Eliot Porter. August 15, 1940.

Eliot Porter, Santa Fe, New Mexico, to J. R. Hildebrand, National Geographic Magazine. April 30, 1940.

J. R. Hildebrand, National Geographic Magazine, Washington, D.C., to Eliot Porter. March 3, 1941.

Patricia Doyle Nicholson, National Geographic Society, Washington, D.C., to Eliot Porter. June 25, 1962.

Karl Struss, Los Angeles, California, to Mother. March 1, 1919.

Karl Struss, Los Angeles, California, to Mother. March 17, 1919.

Karl Struss, Los Angeles, California, to Mother. March 14, 1919.

Franklin Mitchell, Los Angeles, California, to Karl Struss. June 17, 1925.

Paul Eastman, Which and T'Other House, Carmel, California, to Eliot Porter. April 30, 1984.

Ansel Adams, Best's Studio, Yosemite National Park, California, to Eliot Porter. August 27, 1950.

B. Holt, Airpoint, Virginia, to Karl Struss. November 7, 1951.