Music manuscripts, etc., of D. Afan Thomas, comprising instrumental music, 1909-1922; vocal music, namely ballads, monologues and cantatas, 1912-1923; songs, [1890s]- 1928; part-songs 1899-1918; anthems, magnificats and chants, 1904-1923; hymns, [1890s]-[1928] and carols, [c. 1900]-1927; and letters and papers, consisting of letters to Afan, 1902-1928; letters from Afan, 1903-[1928]; miscellaneous letters, 1883-1949, and miscellaneous papers, 1883-[c. 1944], including the manuscript of the biography by Rev. William Evans ('Wil Ifan'), Afan, a Welsh Music Maker [Cardiff 1944].

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.

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.

Musical manuscripts and personal papers of William Mathias, including manuscript and published scores, 1950-1994; personal correspondence, 1972-1992; lectures and articles by him, 1972-1991; reviews, programmes, press releases, newsletters and ephemera relating to his work and honours awarded to him, 1952-1994; and correspondence of Yvonne Mathias relating mainly to performances of her husband's work, 1987-1994.

The five items deposited in 1995 was incorporated to the present structure and given E2d, B14c, K11b, K11c, and J1d as reference numbers.

Two items deposited in 1998 was incorporated to the present structure and given I1b and K18b as reference numbers.

Two items deposited in 2005 was incorporated to the present structure and given I27a and I28a as reference numbers.

An additional box of William Mathias's music manuscripts were received as a donation in August 2006. These manuscripts have been introduced at the end of the present structure as a Sub-fonds, entitled 2006 Donation, in February 2016.

William Mathias Recordings including reel to reel tapes, video tapes and vinyl records donated in July 2015 has been transferred to The National Screen and Sound Archive of Wales.