Ruth Fitch, Rochester, New York, to Laura Gilpin. n.d.

Laura Gilpin to Dean Babcock. February 6, 1926.

Laura Gilpin to Mrs. Hervey. February 9, 1926.

Laura Gilpin to Mr. Putnam. May 29, 1926.

Constance [Elmslie?] to Laura Gilpin. n.d.

Betsy [Elizabeth Forster], Colorado Springs, Colorado, to Laura Gilpin. October 24, 1925.

Laura Gilpin, Colorado Springs, Colorado, to Register of Copyrights. August 15, 1925.

Laura Gilpin to Mrs. White. January 27, 1926.

Brochure for Century Universal Camera, Folmer Graflex Corporation. n.d.

Mrs. Winston, Colorado Springs, Colorado, to Laura Gilpin. n.d.

Quote from "The Firmament of Time" by Loren Eiseley. n.d.

Quote from "The Year of Decision: 1846" by Bernard DeVoto. n.d.

Quote from "Traveler in the Wilderness" by Cid Ricketts Sumner. n.d.

Statement by Eliot Porter. n.d.

Draft of "For A More Livable Planet" by Eliot Porter. n.d.

Draft manuscript of "The Adirondacks." n.d.

Draft of Bird Photography with some observations on Bird Behavior and a few comments on Conservation. n.d.

Draft of Bird Photography with some observations on Bird Behavior and a few comments on Conservation. n.d.

Information and Membership Form for Friends of the Earth. n.d.

Biography of David R. Brower, Friends of the Earth. n.d.