This collection contains correspondence, manuscripts, opera librettos, songs, short stories, novels, sketches, and critical reviews. It also has personal family papers of Kurt (Ashley Vernon) and Greta Hartwig Manschinger, paintings and writings by and other records from Greta's sister Mela Hartwig and her husband Robert Spira, audio recordings, scores, and sheet music, as well as audio recordings of performances.

This collection documents the musical career of Yella Pessl, a harpsichordist, pianist and organist.

The Sylvia Brigham-Dimiziani Collection of Annotated and Manuscript Scores contains eleven musical scores including three works by Lukas Foss that contain markings entered on the scores by Sylvia Brigham-Dimiziani in preparation for performances.

The collection contains scores of 33 musical works by composer, singer, and librarian Joseph Chouinard.

The William Leonard Courtney Papers are comprised one box containing four typed copies of playscripts and one muscial score from the play "Undine."

The collection consists of 79 works by Morton Feldman in either score or part formats (72 scores; 7 sets of parts). All but one item are ink manuscripts on vellum. These served as the masters that Feldman submitted to C. F. Peters and Peters published directly from these masters. Almost all of the manuscripts are in Morton Feldman's hand, except for two scores copied by John Cage and three items in the hand of a music copyist.

The Livingston Gearhart Collection of Scores contains compositions and arrangements by Gearhart in published and manuscript forms, as well as sketches and incomplete works. It also contains published scores by other composers annotated by Gearhart.

Contains correspondence, writings, concert programs, articles, scores, and recordings.

The Sir James Willoughby Gordon Family Papers consists of correspondence of the Sir James Willoughby Gordon Family, principally written in their world wide peregrinations. Groups include letters written to Lady Julia Lavinia (Bennet) Gordon (fl.1808-1861), wife of Sir James Willoughby Gordon (1773-1851), from Richard Henry Alexander Bennet, her father, in France, Lady Emily Elizabeth (Swinburne) Ward (1798-1882), and Sir Henry George Ward (1797-1860), colonial governor, in Mexico, Mrs. Mary (Aston) Grant Gordon just returned from Greece, and Orlando Felix (c.1793-1867), soldier and authority on Egypt, in Bombay. There are also letters with diagrams of sunspots from Sir James South (1785-1867), astronomer, and letters to an unknown correspondent from Lady Gordon while she was travelling through northern England. The remainder of the collection consists of a group of compositions in poetry and music by members of the Gordon Family.

The Corney Grain Archive provides an insight into the talents of Richard Corney Grain and the esteem with which he was held among his theatrical contemporaries. The archive includes personal memorabilia including his correspondence, along with photographs, periodical art and reviews, books written by or about Grain, sheet music of his songs, and programs from his German Reed entertainments, most of which include synopses and song lyrics.