Trained as an anthropologist at Berkeley under A.L. Kroeber and Robert Lowie, Carl Voegelin spent the majority of his career as a structural linguist specializing in Algonquian languages, including Delaware, Potawatomi, Fox, Menominee, and Shawnee, and on the Seneca, Ojibwa (Chippewa), and Blackfoot (Siksika). His most significant contributions came through his studies of Delaware, Shawnee, and Hopi, but he is also credited with reviving the International Journal of American Linguistics after the death of its founder, Franz Boas, and with nurturing the program in anthropology at Indiana University, where he was on faculty from 1941 until his retirement in 1976. The Voegelin collection contains field notes, lexical files, notebooks, papers, correspondence, and other materials relating to Voegelin's work on Native American languages. The bulk of the collection concerns Delaware and Shawnee, but there is significant material for Blackfoot, Menominee, Ojibwa and Potawatomi, Seneca, and Penobscot. Notes on Turkish, kept during the Second World War, are also present. Among other important series in the collection are Voegelin's correspondence and notes concerning two of his major projects: the translation and interpretation of the Walam Olam and his study of Shawnee law. Correspondents include Leonard Bloomfield, Eli Lilly, and Morris Swadesh. A portion of the collection is indexed in Kendall (1982).

The plant physiologist and historian Rodney H. True (1866-1940) divided his career relatively evenly between the Bureau of Plant Industry in United States Department of Agriculture and the Department of Botany and Morris Arboretum of the University of Pennsylvania. A specialist in the physiological function of mineral nutrients in plants, True was active in his later career in the Philadelphia Society for Promoting Agriculture, the Pennsylvania Horticulture Society, and the Agricultural History Society. The True Papers consist of 6 linear feet of material relating primarily to the period of his career spent at the University of Pennsylvania. The collection contains roughly equal proportions of personal and professional correspondence, with a few diaries and research notebooks documenting his involvement with professional organizations and his interests in the history of his discipline.

A Yale-educated ethnographer, William Fenton devoted most of his career to study of the Haudenosaunee. Receiving his doctorate in 1937, Fenton worked with the Bureau of American Ethnology for a number of years before becoming Director of the New York State Museum and professor at SUNY Albany. The Fenton Papers covers all aspects of William Fenton's professional life, documenting his varied positions as community worker for the New York Agency of the U.S. Indian Service, 1935-1937 (accounts, reports, correspondence); associate anthropologist and senior ethnologist in the Bureau of American Ethnology, 1939-1951 (includes notebooks, letters from the field); Executive Secretary of Anthropology and Psychology, National Academy of Sciences-National Research Council, 1952-1954; and Assistant Commissioner, New York State Museum and Science Service, 1954-1968.

Alfred Irving ("Pete") Hallowell was an anthropologist best known for his studies of Ojibwa culture and world-view, and the innovative use of the Rorschach Test in his studies of the psychological interrelations of individuals and their culture. Early in his career, Hallowell worked as a social case worker for Family Service, and even after moving on to study anthropology in 1920 (M.A.), he carried with him an interest in ethnic and racial culture, developing additional interests in psychological testing. Except for the years 1944-1947, when he taught at Northwestern University, Hallowell spent his entire career at the University of Pennsylvania where he was professor of anthropology, professor of anthropological psychiatry in the Medical School, and curator of social anthropology at the University Museum. A cultural anthropologist, Hallowell's use of clinical psychological methods, especially Rorschach tests, was both innovative and controversial in his discipline. In his research, he concentrated on the Algonkian Indians, especially the Abenaki and Ojibwa Indians of Canada and Wisconsin (Berens River, Lake Winnipeg, Manitoba, and Lac du Flambeau, Wisconsin areas), and the Saulteaux of Berens River. The Alfred Irving Hallowell Papers (1892-1981) contain correspondence, subject files, manuscripts of published and unpublished works by Hallowell, papers by colleagues and students, research notes kept by Hallowell, with a special emphasis on social organization, personality, behavior, psychology, religion, and folklore. The collection of several hundred photographs provides rich graphic documentation of Hallowell's work among the Ojibwa and Abnaki Indians during the 1930s.

For many years referred to as the "Franz Boas Collection of American Indian Linguistics," this collection consists of a large body of linguistic and ethnographic material gathered together by Boas and many of his colleagues and students primarily from the 1890s to the 1940s. It contains the bulk of Boas's own fieldwork material, with the main exception of most of his Inuit and earliest Northwest Coast fieldwork. It contains the majority of the work sponsored by American Council of Learned Societies Committee on Native American Languages, which was directed by Franz Boas, Edward Sapir, Alfred Kroeber, and other academic linguists from 1927-1937. The collection, however, also contains related kinds of fieldwork and derived secondary materials created outside the auspices of this Committee, both earlier and later. The first deposit of the material arrivied in 1945. Subsequently, additional related materials were donated and added, as noted in the listings. Additionally, the documentary materials produced by some of the early projects (1945 to circa 1955) of the APS Phillips Fund for Native American Research were added to this collection. The collection has grown to over 80 linear feet of material representing at least 166 languages and dialects from the United States, Canada, and Mexico. The formats range from field notes and ethnographic texts to slip files, vocabularies, lexica, and grammars, and dozens of linguists and Native consultants are represented.