Papers of Meurig Parri, 1972-1987, mainly correspondence and papers relating to anti-war campaigns in Northern Ireland, the Falklands War and CND; general political affairs in Wales, epecially the activities of Plaid Cymru; Welsh language groups; the General Election of 1983, and local elections of West Glamorgan County Council and Cardiff West Parliamentary Constituency, 1979-1984.

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, [early 19 cent.]-1927, of Sir John Ballinger, which include articles, reviews, reports and addresses by Ballinger, some of which relate to libraries in Britain, including a report on the University College of North Wales, Bangor library and reports and other papers, 1903-1910, relating to the Library Association; articles, addresses and notes by Ballinger relating to literary matters and (mainly Welsh) historical events and figures; and papers and correspondence, 1903-1906, relating to the Bible in Wales.