Deeds, rentals, estate receiver's accounts, surveys, valuations, correspondence, maps and plans of the Ashburnham estate in Breconshire, Carmarthenshire and Glamorganshire, 1392-1968 (predominantly 1600-1925); sale catalogues and related papers, 1900-1923, deeds of the Mellington Hall estate in the parishes of Churchstoke and Mainstone in Montgomeryshire and Shropshire, 1753-1937, mortgaged by Samuel Rankin Heap to the trustees of the Ashburnham estate in 1923; manorial records and related papers of the manors of Cantref Selyf, 1650-1810, Talgarth, 1650-1826, Bronllys, 1661-1757, and Crickadarn, 1743-1809, all in Breconshire, and especially of the manor of Pembrey in Carmarthenshire, 1663-1922 (including papers relating to rights of shipwreck); accounts of collieries in Pembrey, 1714-1852 (mainly 1795 onwards), and papers relating to Pembrey tithes, colliery, port and harbour, and foreshore rights and wrecks, mainly 18-early 20 cent.

Title deeds of the Dinefwr estate, 1514-20 cent., in Carmarthenshire, Glamorgan and Pembrokeshire; rentals and accounts, 1587-1777; court rolls of the manor of Iscennen, 1660-1710; a series of copies of royal grants, 1481-1517, to Sir Rhys ap Thomas; and documents relating to the attainder of Rice Griffith, 1531, and to efforts to reverse the attainder, 1547 to temp. James I; records of the Neath Abbey estate, including records of the manor of Cadoxton-juxta-Neath, from 1602; and coal-mining records, Glamorgan, 18 cent.-19 cent.