Elizabeth Forster, Colorado Springs, Colorado, to Laura Gilpin. January 22, 1921.

Otto Simon, Washington, D. C., to Laura Gilpin. July 13, 1917.

Jean Jackson, Colorado Springs, Colorado, to Laura Gilpin. October 19, 1927.

W. K. Jewett, Santa Barbara, California, to Frank Gilpin. August 22, 1927.

Evelyn Morely, San Francisco, California, to Frank Gilpin. August 23, 1927.

Harold Bauer, New York, New York, to Laura Gilpin. July 17, 1925.

Ada T. Cushing, Haute Savoie, France, to Laura Gilpin. September 18, 1927.

Brenda Putnam, New York, New York, to Laura Gilpin. February 14, 1926.

Eleanor S. Smith, San Diego, California, to Laura Gilpin. October 26, 1926.

Gertrude Käsebier, New York, New York, to Laura Gilpin. December 23, 1926.

Augusta, New York, New York, to Laura Gilpin. September 2, 1927.

Florence G. Fishers, Denver, Colorado, to Laura Gilpin. August 23, 1927.

Lovey [Hall], Stony Brooks, New York, to Laura Gilpin. September 2, 1927.

Gertrude Käsebier, New York, New York, to Laura Gilpin. December 28, 1924.

Ralph G. Cahn, San Francisco, California, to Laura Gilpin. March 3, 1926.

Letter from John H. Adams, Natural Resources Defense Council, New York, New York. October, 1987.

Barbara Scott, Dallas, Texas, to Eliot Porter. November 9, 1987.

Theodore A. Snyder, Jr., President, to Eliot Porter. February 23, 1979.

Tepilit Ole Saitoti, Boston, Massachusetts, to Eliot Porter. August 26, 1974.

George Yealis, Harrogate, to Eliot Porter. September 1, 1962.