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.

Family and estate records of the Lloyd family of Glansevin and Mandinam, Llangadog, Carmarthenshire, and of the associated families of Harries of Llandovery and Price of Ystrad-ffin, Carmarthenshire, Lloyd of Wern Newydd and Edwards of Derry-odyn, Cardiganshire, and Price-Jones of Glanhafren, Montgomeryshire, including rentals of the Glansevin estate, 1740-1742 (including Wern Newydd estate), 1888-1915, Glanhafren estate, 1749-1757, and Wern Newydd, 1844-1851; household and farming accounts of the Glansevin estate, 1731-1892, title deeds and abstracts of title, 1542-1872, mainly Glansevin estate; estate and legal correspondence, mainly second half of the nineteenth century, rentals of the estate of David Lloyd Harries, Llandingat House, Llandovery, 1843-1863; and estate, legal and personal papers relating to Penllwyn, Llanddewibrefi, Cardiganshire, 1788-1858, and the Derry Odyn estate in the same county, 1800-1865.

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.