Music manuscripts and papers of David Vaughan Thomas, 1841-1986, including personal papers of D. Vaughan Thomas, 1885-1932; correspondence, 1906-1945; musical compositions, 'Llyn y Fan', songs and hymns, [c. 1906]-[c. 1933]; published compositions, 1906-1933; lecture notes, [c. 1910]-1930; press cuttings, 1910-1938; and miscellaneous family papers, 1841-1986, including papers of Vaughan Thomas's grandfather and programme of a centenary concert, 1973.

Music compositions and related papers of Dr David Moule-Evans, 1925-1988; including orchestral symphonies, sonatas and other pieces, 1925-1965; and obituaries to him 1988.

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.

Music manuscripts and miscellaneous papers, 1893-[1999], transferred on the closure of the Welsh Music Information Centre, Cardiff, comprising a large number of music scores and sketches. Among the composers represented in the archive are Robert Bruce, Dilys Elwyn Edwards, John Edwards, J. R. Heath, Alun Hoddinott, Arwel Hughes, Idris Lewis, Ian Parrott and Grace Williams.

Llawysgrifau cerddorol a phapurau amrywiol, 1893-[1999], a dderbyniwyd adeg cau Canolfan Hysbysrwydd Cerddoriaeth Cymru yng Nghaerdydd, yn cynnwys nifer fawr o sgoriau cerddoriaeth. Ymhlith y cyfansoddwyr a gynrychiolir yn yr archif mae Robert Bruce, Dilys Elwyn Edwards, John Edwards, J. R. Heath, Alun Hoddinott, Arwel Hughes ac Ian Parrott.

Additional music manuscripts, 1963-1969, comprising scores by Grace Williams, Daniel Jones, and William Mathias; together with papers [1906-1975], relating to Grace Williams [photographs transferred to NLW Photographic Department].