Consists of correspondence with family, friends, and professional associates, field notebooks, journals, writings, and other material primarily related to Marshall's forestry career with the Office of Indian Affairs and the National Forest Service. Also included are papers and writings related to his field work mapping the Koyukuk area of Alaska, his work with the Wilderness Society, and his love of walking and climbing peaks, especially in the Adirondacks.

Robert Marshall, forester and environmentalist, was born in New York on January 2, 1901. The son of Louis Marshall, a constitutional lawyer and philanthropist, Robert Marshall developed an early interest in mountains, the outdoors, and activism. After graduating from the Ethical Culture School in New York, he attended Columbia College, the New York State College of Forestry at Syracuse, and then Harvard University. From 1925-1928 he worked at the United States Forestry Service's Northern Rocky Mountain Forest Experiment Station in Missoula, Montana returning to school in 1928 at Johns Hopkins University to earn a Ph.D. in Plant Physiology.

Number of containers: 17 boxes, 5 cartons, 4 card file boxes, 1 oversize box, 3 oversize folders and 7 volumes Linear feet: 16.45

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Collection is open for research.