Manuscripts and papers collected by Canon Trevor Owen (d. 1916). They include a group of papers of Sir William Williams ('Speaker Williams', 1634-1700), papers of John Williams (1700-87), attorney-general of the Chester Circuit and Chief Justice of the Brecon Circuit, and papers of John Roberts, Maes-y-porth ([1767]-1824), deputy registrar of the diocese of Bangor. The papers of Sir William Williams include personal papers and correspondence mainly relating to his purchase of the Llanforda estate, 1678-88; papers and correspondence re his offences and fine in scandalum magnatum against James II and the Earl of Peterborough, 1684-9; legal papers linked with his work, 1675-98; political papers and correspondence concerning parliamentary proceedings and the religious issues of the Stuart period, 1668-c. 1700; and printed political pamphlets and poetry, 1676-[1697x1700]. The papers of John Williams all relate to his legal work, c.1740 x c.1787. Canon Trevor Owen's own papers comprise deeds, mainly for lands in Denbigh, 1741-1883, and correspondence about a legal case, 1882-3. The papers of John Roberts comprise deeds, 1773-c. 1820, and correspondence, 1800-17, connnected with his work as deputy registrar of Bangor, and Maes y porth estate deeds, papers and correspondence, 1774-1827. The collection also contains deeds re premises in Neston, Cheshire, 1731-1802; and miscellaneous 18th-19th century papers.

Papers of Lord Elwyn-Jones, 1921-1989, including correspondence, 1958-1989; material for speeches, 1953-1987; papers relating to the Nuremberg War Trials, 1944-1989; family and personal papers, 1921-1990; papers relating to foreign affairs and foreign visits, 1933-1938; legalc cases, [c. 1940]-1989; subject files, 1927-1989; memoirs, 1975-1984; printed and circular material, 1957-1989; Walter Idris Jones papers, 1930-1979; and office diaries, 1977-1979.