The bulk of the collection is indexes to a personal collection of big band and jazz music. It includes scores, lead sheets, photocopies, songbooks, Ian Campbell Music Manuscripts, and a discography.

Leroy Ostransky (1918-1993) was a composer, author, and a professor of music at the University of Puget Sound. An expert on jazz, he was widely recognized for his contributions to education and the arts. This collection contains files, correspondence, audio recordings, manuscripts, class notes, clippings, musical scores and compositions.