The music manuscripts and papers, 1933-2010, of Alun Hoddinott, comprising a large group of music scores and sketches, [1940?]-2007; and papers, 1933-2010, relating to his life and work, comprising mainly correspondence, 1933-2010, scrapbooks, 1940-2008, concert programmes, 1936-2008, catalogues of works, 1946-2007; and articles and reviews, 1954-2006. Two additional manuscripts: anthem 'In the Beginning' (Opus 23A), and Toccata alla Giga for organ (Opus 37), purchased July 2016 have been incorporated into the main series of music A3 and A5. An additional group received in 2017, of mainly personal papers and correspondence is listed under 'Alun Hoddinott, 2017 (additional)'. Additional papers comprising handwritten scores of Alun Hoddinott's Nocturne 1 for Piano (Opus 9) (1956) and Nocturne 2 for Piano (Opus 16, No. 1) (1959) (December 2021 donation) have been added to the description. A sketchbook of Symphony II Op29 was purchased September 2022.

Papers, 1795-1980, mainly relating to John Roberts and his family, including papers, 1846-1888, concerning John Roberts, among them manuscript music, letters to Roberts and press cuttings; papers, 1875-1953, of, or relating to, J. L. Roberts ('Telynor Maldwyn', son of John Roberts); miscellaneous family papers, 1907-1911; stray letters, 1874-1980; music manuscripts, 1848 and undated; miscellanea, 1905-1981; and printed items, 1832-1848.

Music manuscripts of Dr Llifon Hughes-Jones, including works commissioned for National Eisteddfod competitions; together with correspondence and other papers, 1992-1994 and undated, relating to copyright and publishing matters.

Papers of Tom Euroswydd Afan Richards, comprising letters, 1918-1942; papers relating to radio broadcasts, 1927-1932; concert programmes, 1924-1945; press cuttings relating to his career as a musician, including his conductorship of the Haverfordwest Music/Choral Society, and as a broadcaster and eisteddfod adjudicator, c.1910-1947; correspondence, press cuttings and photographs reflecting his involvement with amateur boxing in Swansea, c.1958-1965; and miscellaneous items.