Serge Prokofiev (1891–1953) was a Russian and Soviet composer, pianist and conductor, and seminal figure in the history of twentieth-century music. The Serge Prokofiev Archive (SPA) contains 58 original music manuscripts and over 10,000 letters and documents primarily from 1918-1936, the years Prokofiev spent in the West. The SPA also includes an expansive collection of music manuscript copies, published scores, concert programs, scholarly books and articles, photographs, and audio and video material, making it the premier research collection for studying Prokofiev's life, work and legacy.

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 collection contains four series: Volumes, Pamphlets, Song Sheets, and Manuscripts.

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.

Sylvia Marlowe (1908-1981) was an important mid-twentieth century American harpsichordist. The Sylvia Marlowe collection documents her performance career, predominantly through scores, many inscribed to her by composers. Additionally, photographs and textual publicity materials provide further context for Marlowe's performances and recordings.

Harpsichordist Sylvia Marlowe (1908-1981) contributed to popularizing harpsichord music and promoting new works for the harpsichord in the twentieth century. The collection includes personal correspondence, photographs, clippings and programs, contracts and wills, analog audio reels of important albums Marlowe recorded, and a set of scores of classical pieces set in contemporary popular arrangements composed for Marlowe. The collection also contains correspondence and documents relating to the Harpsichord Music Society (founded by Marlowe) and Kenneth Cooper, its director.

The records of personal papers of Anna Maria Talbert and family between 1881 and 1938, and legal documents of the inheritance issues between 1872 and 1927.

Music manuscripts and books collected by Victor Hammer, including a copy of Ein Beitrag zur Ornamentik by Heinrich Schenker, musical sketches and three books of lute tablature, correspondence of Carolyn Reading Hammer with Clifford Wurfel and Robert Lang of the University of California at Riverside Library, a drawing of Hans Weisse by Victor Hammer, and manuscripts of compositions by Hans Weisse, with dedications to Victor Hammer.

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

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