Music manuscripts and personal papers of the composer William George, 1865-1920, including anthems, [1900]-1920; hymns, 1894-1920; part-songs, [1901]-1908; marching songs, 1901-1913; secular music, 1910-1917; duets, 1913-1919.

Music manuscripts and papers of the composer and teacher, Gilmor Griffiths.

A scrapbook kept by Hubert Davies (1893-1965), composer and musician, born at Abersychan, including papers relating to his time as a student of the violin at the Royal Academy of Music, concert programmes, photographs and photocopies of articles on music by him published in the Western Mail, together with a list of his manuscripts deposited at the BBC Library, Cardiff, and tributes to his widow Mrs Hannah Davies (d. 1970).

Musical manuscripts of the composer Grace Williams, [1928]-1992, including orchestral scores of her works, [1932]-1973, concertos for solo instruments and orchestra, 1950-1973; scripts and scores for narrator and orchestra, 1946-1963; incidental and chamber music scores, [1930s]-1970; choral music scores [1928]-1975; film and incidental music, 1948-1970; personal and miscellaneous papers, 1826-1936; and poetry by Vivien Cutting, 1947-[1967]; note on the papers, by A. J. Heward Rees, 1997.

The music manuscripts of the composer David Harries, 1952-1995, comprising mainly drafts and scores of chamber and instrumental music, orchestral music, choral and organ, and voice and piano arrangements.
A second donation made in August 2021 contains further music manuscripts of David Harries, 1953-1993, and includes works by Harries' contemporary William Mathias (1934-1992) in addition to Harries' own compositions of chamber and instrumental music, orchestral music, choral and organ, and voice and piano arrangements.