This is a diverse collection containing professional correspondence, often relating to lectures, speeches, and articles; reprints; and numerous tape recordings.

Dell Hymes' doctoral research on Kathlamet Chinook (Indiana University, 1955) grew into a lifelong interest in the relationship between ethnography and linguistics. Following academic appointments at Harvard University (1955-1960) and the University of California, Berkley (1960-1965), Hymes joined the Department of Anthropology at the University of Pennsylvania in 1965. During twenty-two years tenure at Penn he was a professor of folklore, linguistics, sociology and education. In 1975, he was promoted to Dean of the Graduate School of Education (1975-1987). A principal proponent of the emergent field of sociolinguistics, his most influential works include Reinventing Anthropology and Language in Culture and Society. The Hymes papers cover all aspects of Dell Hymes' professional life. Subcollection I is concentrated on his years at the University of Pennsylvania, his presidencies of the American Association of Anthropology and the Linguistic Society of America, and his editorship of the journal Language in Society. Subcollection II is broader, focusing much more on published and unpublished linguistic work on dozens of languages, mostly of North America. Of particular interest is his rich correspondence with colleagues and students on linguistic issues. The papers reflect Hymes' interests in the history of linguistics and anthropology, Native American languages (especially oral literatures), and his comparative ethnographies of communication.

The Mary Rosamond Haas papers are extensive, including correspondence, research notes, field notes, texts, lexical slip files, audio recordings, photographs, reprints and more, covering more than 100 languages of North America and Southeast Asia. Of particular value are notes and audio recordings from fieldwork from the 1930s on Ditidaht, Tunica, Natchez and Muscogee, work toward pedagogical materials for Thai, and groundbreaking comparative studies of several language families of North America.

The papers contain correspondence, research and teaching notes, data (card and slip) files, published and unpublished manuscripts by Lounsbury and others, books and reprints, sound recordings, and computer programs and files. Correspondents include: William N. Fenton, Mary R. Haas, William C. Sturtevant, Morris Swadesh, and Carl F. Voegelin. Roughly one-quarter of the collection relates to Iroquoian languages and includes much WPA Oneida Project material. Research into the Cherokee language, South American languages, and kinship structures is also well represented. Floyd Lounsbury's wife, Masako Yokoyama Lounsbury, is represented by a smaller amount of material relating to linguistic research in Shanghai and research on Quechua.