A set of field notebooks by Ethel Aginsky and mostly Puyallup consultants, in and around Puyallup, WA, 1935-1936, documenting language and culture. Two additional notebooks of Aginsky's class notes.

The Charles E. Fiero Papers contain word lists, texts, illustrations, and audio recordings derived mostly from missionary linguist Fiero's fieldwork among Ojibwe speakers in Ontario, Manitoba, and Minnesota, between the 1950s and the 1990s.

Collection of research notes by Ilse Lehiste, mostly relating to phonetics. The collection includes over 200 audio recordings (mostly reel-to-reel tapes, and a small amount of cassettes and commercial Estonian vinyl records), many spectrograms (rolled and flat), research notes towards publications, other lab notes, and correspondence and other professional files. This collection is not yet processed. Languages within the collection include Estonian, Finnish, Baltic languages, Icelandic, Russian, Cree, Siksika, and Denesuline (Chipewyan).

Frank Siebert (1913-1998) is one of the key contributors to the field of Algonquian linguistics. While he did not pursue a degree in linguistics or anthropology, he independently acquired the skills and knowledge of a professional scholar. His work on Penobscot is some of the best and most comprehensive in existence. The Siebert Papers document the interest and work of Frank Siebert in the linguistics of the Algonquian family of languages, particularly Penobscot. The collection includes correspondence, research notes, drafts and published manuscripts by Siebert, as well as secondary sources consulted by Siebert. To a lesser extent, it contains material that documents Siebert's personal life, his interest in book collecting and his career as a physician.