Francisco Soares de Souza was a guitarist and composer from Brazil. The collection contains photocopied manuscript scores of Souza's compositions for guitar.

Frank Willis was a classical pianist and composer who attended Peabody Conservatory and was a composer and conductor for the West Virginia Symphony Orchestra. His papers include manuscript and published scores and some contextual material.

Franz Carl Bornschein (1879-1948) was a composer of more than 200 works, primarily vocal music, and a professor of violin and composition at the Peabody Conservatory. His papers include scrapbooks, clippings, correspondence, photographs, personal papers, manuscript and printed scores, and the personal papers of his wife, Hazel Knox Bornschein.

Gardner Jencks was a pianist and composer who grew up in Baltimore and earned an artist diploma from the Peabody Conservatory. His papers contain manuscript and printed facsimile scores of his unpublished compositions, papers related to his study of music, and various items of ephemera.

The Glenroy C. Stein papers contain scores and method books written by Stein and various other composers. Also included are personal papers which include newspaper clippings, correspondence, posters, and concert programs.

Henrietta Baker Low was instrumental in establishing the music teacher education program at the Peabody Conservatory. Her papers contain personal essays and a letter describing her work, a pamphlet outlining public school curricula in Baltimore, and musical scores of her song "Goodnight Little Baby."

Howard Thatcher was a pianist, organist, composer, and teacher in the Baltimore area. He was an alumnus of Peabody who taught harmony, counterpoint, orchestration, and composition for the Peabody Conservatory. The Howard R. Thatcher papers contain his manuscript and published scores as well as personal papers.

Hugh Raymond Newsom (1891-1978) was an organist and composer who lived in Baltimore. The collection includes manuscript scores of music composed by Hugh Newsom or by his wife, harpist Marjorie Brunton Newsom; documents related to Hugh Newsom's career; and reel-to-reel recordings of his music.

Jean Eichelberger Ivey (1923-2010) was a composer, pianist, electronic musician, professor, and the founder of the Peabody Conservatory Electronic Music Studio, which she directed from 1969 until her retirement from Peabody in 1997. The Jean Eichelberger Ivey papers contain scores and recordings of Ivey's musical works, writings and notes by Ivey, personal and professional correspondence, programs and clippings, photographs, and other personal and professional papers.

Joe Byrd (1933-2012) was a bassist and Peabody Conservatory alumnus who regularly played in jazz ensembles with his older brother, guitarist Charlie Byrd. The Joe Byrd papers contain professional files, music manuscripts, and sound recordings from his career, especially the last decade.

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.

The John R. Paulus collection of woodwind chamber music scores contains mostly printed music published between 1850 and 1940 for instruments such as flute, oboe, bassoon, and clarinet.

Joseph Schillinger was a theorist and composer famous for developing the Schillinger System, a method of deconstructing music using geometric phase relationships. The collection contains correspondence, recordings, scrapbooks, photographs, artwork, manuscript scores, and other documents related to his professional and personal life.

Margaret Page Ingle was an organist, composer, and music teacher who studied at the Peabody Conservatory and spent much of her teaching career in Baltimore. The collection contains manuscript and printed scores of Ingle's compositions and arrangements, notes, and a draft of a play.

The Marion Rosette papers contain scores, working documents, personal papers, and recordings from Rosette’s career as a composer and arranger of children's music.

The Mary Sue Sklarevski papers consists of material relating to Sklarevski's career as a musician, composer, and poet. The majority of the collection consists of manuscript scores. Various personal papers, photographs, and published poetry are also included.

Morris Moshe Cotel (1943-2008) was a composer and pianist who was a member of the Peabody Conservatory faculty from 1972 to 2000. The Morris Moshe Cotel papers consist of letters from Cotel to his first wife, Karen Schwartzman, while Cotel was living in Rome and Israel in 1967 and 1968, as well as manuscript facsimile scores of two of his early compositions.

Nicholas Maw (1935-2009) was a British composer who taught at the Peabody Institute from 1998 to 2008. The Nicholas Maw papers (approximately 1956-2009) contain manuscripts, scores, and recordings of musical compositions by Maw, including the opera Sophie's Choice. The collection also contains correspondence, programs, reviews, lecture notes, and other personal papers.

Otto Ortmann was the director of Peabody Conservatory of Music from 1928 to 1941 and founder of the conservatory's department of research, where he conducted studies on the education, psychology, and physiology of music. His papers include scores of original compositions, writings on music research, research notes, administrative files, concert programs, photographs, and teaching materials.