Records of the Broom Hall estate, Caernarfonshire, 1625-1939, comprising deeds, 1567-1946, rent books and rentals, 1787-1816, 1856-1942, ledgers, 1907-1937, cash books, 1907-1939, wages books, 1905-1946, and correspondence, 1748-1925, deeds, 1664-1808, and account and rent books, 1785-1871, of properties in St James Westminster and St Martin in the Fields, Middlesex; deeds relating to the Bodfel estate, Caernarfonshire, 1725-1854; rentals of the Madryn estate, 1816-1819, and Meillionydd estate, 1846-1857, both in Caernarfonshire; and a record of the average price of corn, 1771-1826.

Records deriving from administration of the Clenennau, Glyn, Sylfaen and Ystumcegid estates in Caernarfonshire and Merionethshire, 1530-1902. The lands belonging to Clenennau were situated in Penmorfa, Gest, Llanfihangel-y-pennant, Beddgelert, Llanystumdwy, Caernarfon town, Pwllheli, Treflys and Ynyscynhaearn, Caernarfonshire, and in Llanfair[-juxta-Harlech], Llanenddwyn, Llanfihangel-y-traethau, Penrhyn, Ffestiniog, Penllyn, Llanfrothen and Nanmor, Merionethshire. The Glyn and Sylfaen estates lay in Talsarnau, Llanfihangel-y-traethau, Llandanwg, Llandecwyn and Llanaber; and Ystumcegid in Llanfihangel[-y-pennant], Llanystumdwy, Penmorfa, Cricieth, Clynnog and Penyfed. The records from each estate are similar, comprising rentals and related papers, [1535]-1849, accounts, 1534-1827, leases, 1530-1842, correspondence, 1609-1888, and miscellaneous estate administration papers, 1662-1902. It is interesting to note the relationships of the Owen family with the eighteenth century estate stewards, notably Anne Jones of Clenennau, Griffth Parry, John Parry of Brynbanon and Humphrey Owen of Lasynys.

Miscellaneous papers, 1590-1938, deriving from the administration of estates in Caernarfonshire, Monmouthshire, Shropshire, Berkshire, Hertfordshire, Cornwall and elsewhere, where the provenance is unknown.

The group consists of administration papers for the Caernarfonshire estate, comprising estate accounts, 1740.

Family and estate records of Griffith of Porthamal, Anglesey, and Llanfair, Caernarfonshire, Griffith of Brynodol, Caernarfonshire, and the associated families of Rowlands of Nant, Caernarfonshire, and Wynn of Taltreuddyn, Merionethshire. The estate records include rentals of the Llanfair estate, 1516-1669, the Brynodol estate, 1581-1751, the Cefnamwlch estate, 1630-1717, the Nant estate, 1702-1719, the Taltreuddyn estate, 1744-1848, the Llanfair and Brynodol estate, 1761-1832, and rentals from various other estates, 1615-1816; and deeds of the Porthamal and Llanfair estate, 1435-1673, the Brynodol (and later Llanfair and Brynodol) estate, 1564-1864, and the Taltreuddyn estate, 1664-1751. -- The archive also includes rentals of Crown rents in Anglesey, Caernarfonshire, Denbighshire, Flintshire and Merionethshire, 1558-1798, and ministers' accounts, 1365-1825; Caernarfon borough records, 1545-1783, including rentals of corporation property, lists of burgesses, and notes on the constitution of the borough and the appointment of officers; and a number of literary and historical manuscripts.

Papers relating to the Madryn estate, Caernarfonshire, mainly comprising accounts, 1834-1904, title deeds, 1806-1890; family correspondence, 1833-1868; and papers of Roger Edwards, Mold (1811-1886), Calvinistic Methodist minister and author, whose grand-daughter, Eleanor, married George Frederick Cunningham Yale, a descendant of the Jones-Parry family.

Estate records of the Edwards family of Nanhoron, Caernarfonshire, and associated families, including the Vaughan of Bronheulog, Denbighshire, Lloyd of Rhosbeiro, Hirdrefaig, Angelsey, and Jones of Gelliwig, Caernarfonshire, comprising mainly title deeds, 1476-1880, relating to lands in Anglesey, Caernarfonshire, Denbighshire, Flintshire and Merionethshire, and estate correspondence, mainly 1781-1857.

Estate and family papers of Owen and Wynne families of Peniarth, Merionethshire, [15 cent.]-[19 cent.], including groups relating to Mostyn of Nant and Mostyn and Williams of Penbedw, Flintshire, to Maurice of Lloran, Denbighshire, and to Corbet of Ynysmaengwyn, Merionethshire, including estate papers, 1630-1870, rentals and accounts; deeds, 1361/2-1963, mainly for Peniarth, Aberllefenni, Penbedw, Drenewydd and Mallwyd estates; legal papers, 1539-1848; industrial papers, 1615-1852; county administration, 1468-1874; and non-family trust papers, 1468-1878, mainly relating to the Ynysymaengwyn estate.

Records of the Lloyd family of Cefn, Denbighshire, and of their estates in Caernarfonshire, Denbighshire and Flintshire, mainly comprising deeds, 1422-1900, including deeds relating to lead and coal mines in Flintshire and copper mines in Caernarfonshire, 18-19 cent.; papers relating to ecclesiastical affairs, 1562-1864; and important papers of Humphrey Humphreys (1648-1712), cleric and antiquarian, and bishop of Bangor, 1689-1701, and Hereford, 1701-12, relating to his period as bishop of Hereford.

Records of the Voelas and Cefnamwlch estates in Denbighshire and Caernarfonshire, mainly 19 cent.-20 cent.; including rentals, 1808-1949, uncommonly full estate correspondence, 1866-1948, building accounts, 1865-1870, estate ledgers, 1866-1912, title deeds, 1726-1956, valuations, 1855-1945; records of the Pooley estate, Warwickshire, and the Pooley Hall colliery, 1838-1909; and family and personal papers of the Wynne and Wynne-Finch families, including letters from Alice Mary Sybil Wynne Finch, 1914-1917, William Heneage Wynne Finch, 1919-1929, and John Charles Wynne Finch, 1924-1945.