F. W. LaRouche, Department of the Interior Bureau of Indian Affairs, Washington, D. C., to Helen M. Post. December 20, 1940.

Envelope labeled Biology, containing six contact prints.

Paul L. Fickinger, Department of the Interior Bureau of Indian Affairs, Washington, D. C., to Helen M. Post. February 21, 1941.

Willard W. Beatty, Department of the Interior Bureau of Indian Affairs, Washington, D. C., to Helen M. Post. December 16, 1940.

Short Form Contract for photographic negatives from US Department of the Interior. June 12, 1940.

Herman Craeybeckx, Antwerp, Belgium, to Nell Dorr. August 31, 1961.

John Howard Griffin to Nell Dorr. April 25, 1967.

John V. N. Dorr to Nell Dorr. January 31, 1948.

Tine Everhard, Valle de Bravo, Mexico, to Nell Dorr. May 9.

Herman Craeybeckx, Tessin, Switzerland, to Nell Dorr. May 18, 1962.

John V. N. Dorr to Nell Dorr. June 22, 1953.

John Howard Griffin to Nell Dorr. August 18, 1968.

Elizabeth Koons Howe, Concord, New Hampshire, to Nell Dorr. June 9, 1948.

Pooh [Nell Dorr], Sanibel, Florida, to Bet [Elizabeth Koons Howe]. n.d.

Grace M. Mayer, New York, New York, to Nell Dorr. December 8, 1963.

Joan Hardee to Nell Dorr. n.d.

Grace M. Mayer, The Museum of Modern Art, New York, New York, to Nell Dorr. June 13, 1961.

Claudette Baril, Middlesbury, Connecticut, to Nell Dorr. June 15, 1980.

Herman Craeybeckx, Antwerp, Belgium, to Nell Dorr. October 27, 1964.

John Howard Griffin to Nell Dorr. December 9, 1970.