Deeds, 1555-1918, of clients and relating to properties in Cardiganshire, Merionethshire, Montgomeryshire and Radnorshire, including papers of the Penglais estate in the Aberystwyth area, 1555-1918; Aberystwyth borough records, 1759-1813; letters, 1794-1882; papers of John Parry, solicitors, Aberystwyth, including share certificates of the Aberystwyth Gas and Coke Company, 1839; Bwlch Consolidated Lead Mines, 1847; records concerning the Aberystwyth and Tregaron Bank, 1813-1844; miscellaneous papers, [c. 1783]-1932; printed items, [c. 1783]-1867; certificates of shares in the Aberystwyth Public Rooms, 1818-1821, and the Robinson Gold Mining Company, 1903; letters and papers relating to the estate of Roderick Richards, Penglais, [c. 1830]; builders' accounts, 1845; and tithe receipts, 1927-1932.

Deeds, 1521-1690, relating to the estates of the Parry and Vaughan family of Aberdihonw and Trebarried, Brecknockshire.

Deeds and documents, 1870-1907, concerning the estates of the Crewe-Read family of Llandinam Hall, Montgomeryshire.

Deeds and documents relating to properties mainly in Montgomeryshire, 1615-1910.

Deeds and documents of the Bennett family of Glanyrafon, Montgomeryshire, and the Owen family of Dolgoed and Llawrpenegoes, 1546-1946, relating mainly to properties in the parishes of Llanidloes, Llanwrin, Penegoes, and Trefeglwys, Montgomeryshire, and Talyllyn, Merionethshire; and a map of properties in Trefeglwys, 1819.

Deeds and documents relating to Trimsaran Coal, Iron and Steel Company, [c. 1861]-1872; Ynisarwed Resolven Colliery Company, 1866-1875; and Yniscedwyn Iron, Steel, and Coal Company, 1837-1875; and copies of Court Rolls of the Manor of Evenjobb, Radnorshire, 1798-1851.