Papers of Henry Richard and his family, [early 19 cent.]-1904, including correspondence, 1808-1904; travel journals, 1849-1886; a few items relating to education in Wales, 1870-1883; sermons by Ebenezer Richard, [early 19 cent.]-1834; a family register, 1809-1836; and papers of James Hughes (Iago Trichrug), [1800x1844].

Papers collected by John Bryn Roberts, including correspondence, 1830-1887; legal certificates, 1863-1897; diaries, 1838-1930, kept by Bryn Roberts and some other members of the Roberts family; photographs, [c. 1880]-1924; notes on legal cases and topics, [c. 1902]-[c. 1921]; letters, 1888-1926, from John Bryn Roberts to the press; newspaper reports transcribed, 1883-1905; notes for his speeches, 1885-1905; notes on political topics, [c.1892]-[1926]; general notes, [1860]-[1894]; election addresses, 1885-1924; political leaflets and pamphlets, 1880-1927; official publications, 1889-1927; legal publications, 1863-1930; miscellaneous printed matter, 1883-1925; Calvinistic Methodist papers, 1844-1928; papers relating to the University of Wales, mainly the University College of North Wales, Bangor, 1882-1926; newspaper and magazine cuttings, 1874-1929; newspapers and periodicals, 1902-1928; bills and receipts, 1781-1926; notebooks and account books, 1833-1900.

Welsh Republican Movement and Plaid Cymru papers collected by Cliff Bere, 1940-1973, including correspondence, [c. 1947]-1965; membership forms and subscriptions, [c. 1948]-1957; constitution, meetings and reports, 1949-1952; newspaper cuttings, 1949-1991; political and personal correspondence, 1933-1997; papers relating to Plaid Cymru, [c. 1949]-1996, including the Parliament for Wales Campaign, Cymdeithas yr Iaith (Welsh Language Society) campaign for bilingual road signs, 1971; 'Cofiwn', the National Commemoration Association, 1976-1987; the Welsh Socialist Republican Movement (Mudiad Gweriniaethol Sosialaidd Cymru) 1975-1985; Cymdeithas Cyfamod y Cymry Rhydd (the Society of the Covenant of the Free Welsh) 1986-1994; Cardiff City Planning Department, 1965-1982; Harri Webb papers, 1949-1996; Eurig ap Gwilym [d. 1988], 1976-1988; papers relating to holiday homes arson campaign and Bere's arrest, 1980-1982; Yr Undeb Celtaidd /The Celtic League, 1988-1993; the Free Wales Army, 1993-1998; unpublished drafts of articles, 1934-1996; various journals and pamphlets, [c. 1946]-1976; newspapers cuttings, 1946-1997; undated translations of pamphlets published by the National Museum of Wales; papers, 1984-1998, relating to his publications, and other printed ephemera, 1935-1956.

Eight diaries, 1873-1880, kept by Stuart Rendel, later Lord Rendel (1834-1913), recording details of domestic and family life, together with references to the business relationship of the Rendel family with Sir William Armstrong of Newcastle and his family, particularly in engineering and arms manufacture. There are many references to work undertaken for the Elswick Ordnance Company. The diary for 1880 refers to Stuart Rendel's early activities at the House of Commons as the MP for Montgomeryshire.