Elsa Baklor was a coloratura soprano and music educator who taught at the Peabody Conservatory and privately in the mid-twentieth century. Her collection of five scrapbooks contain clippings, photographs, and concert programs related to her career as a performer and teacher.

Enrico Caruso (1873-1921) was one of the most popular operatic tenors of his era. After beginning his career in his native Italy, Caruso immigrated to the United States and became a star at the Metropolitan Opera. His papers include manuscript and published scores belonging to Caruso, photographs, correspondence, scrapbooks and clippings about his career, caricatures and other artwork, recordings, and ephemera.

John Charles Thomas was an internationally known baritone who attended Peabody Institute from 1909 to 1912. His papers include scores, personal and business papers, concert programs, clippings, correspondence, ephemera, photographs, and recordings.

Soprano Phyllis Bryn-Julson taught at the Peabody Institute from 1984 to 2017 and is known for her performances and recordings of 20th-century vocal music. The Phyllis Bryn-Julson papers contain programs, photographs, and other publicity materials from her singing career, correspondence with composers and other musicians, and scores of vocal music with Bryn-Julson's performance markings.