Emma Miller Gilpin, Colorado, to Laura Gilpin. April 22, 1912.

Elizabeth Forster, Colorado Springs, Colorado, to Laura Gilpin. May 6, 1922.

Laura Gilpin, New York, New York, to Elizabeth Forster. April 21, 1922.

R. W. Weed, Southern California Camera Club, Los Angeles, California, to A. B. Titus. March 23, 1922.

Grace Brooke, Washington, D.C., to Laura Gilpin. September 24, 1916.

Anne Simon, Washington, D.C., to Laura Gilpin. February 7, 1916.

John Howard Griffin to Nell Dorr. February 19, 1971.

John Howard Griffin to Nell Dorr. April 18, 1969.

Grace M. Mayer to Nell Dorr. n.d.

Rose Mentzel, Stuttgart, Germany, to Nell Dorr. July 1, 1956.

Margaretta and Frederick Mitchell, to Nell Dorr. July 17, 1960.

Margaretta Mitchell to Nell Dorr. n.d.

Robert Mayo Tenery to Nell Dorr. n.d.

Margaretta Mitchell to Nell Dorr. n.d.

Margaretta Mitchell, Polaroid Corporation, Cambridge, Massachusetts, to Nell Dorr. n.d.

Barbara Tenery, Chicago, Illinois, to Nell Dorr. March 5, 1966.

A Week On the Concord And Merrimack Rivers List. n.d.

"On the Great American Plateau" By T. Mitchell Prudden. n.d.

Journal VIII List. April and May.

Glen Canyon of the Colorado River. n.d.