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).