Papers of the Rev. David Glanaman Jones, Pontardawe, 1887-[1946x1951]. including notebooks, 1887-1942, [1946x1951], containing poetry, including some by his brothers, together with some sermon notes and addresses; other poems and addresses, [20 cent., first ½]; papers, 1906-1932, collected while researching and writing Cofiant Cranogwen (Caernarfon, 1932); and papers relating to the family of Mrs D. G. Jones.

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.

Papers of Harri Webb, [c. 1919]-1995, including poetry, 1942-1989; reviews and reader's reports, 1974-1986; correspondence with publishers, broadcasters and editors relating to Webb's work, 1949-1995; correspondence from literary and artistic figures, [1940s]-1983; political correspondence, 1964-1974; political press cuttings, 1952-1981; papers relating to Plaid Cymru, 1961-1978, and Scottish politics, 1967-1969; and personal papers, [c. 1919]-1984.

A collection of Harri Webb's diaries. This group remains uncatalogued.