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

Manuscripts and rare books relating mostly to the counties of Brecknockshire and Carmarthenshire, on subjects such as history, topography and especially genealogy, 1604-1859, including a transcript of the Golden Grove Book of pedigrees and other pedigrees, relating mainly to South Wales families; 19th century transcripts and copies of letters, including some from Sir Walter Raleigh, [1624]-[1807]; lists of Carmarthenshire sheriffs and Brecknockshire Lords Lieutenant, 1809-1849; parts of original manuscripts of Theophilus Jones and William Owen Pughe, [1792]-[1805]; notebooks and scrapbooks, 1839; and various annotated printed books; and deeds and other documents, 1588-1911, relating mostly to properties in Brecknockshire (particularly in the parish of Bronllys), with a few relating to Carmarthen and Swansea.

Research papers of Cecil Vaughan Owen, relating mainly to the history of Montgomeryshire and including: Llanidloes and Llangurig School minute books, 1904-1972; leaflets, press cuttings, posters, sale catalogues and other source materials, and notes on the history of Llanidloes and Montgomeryshire and various local churches, 1800-1980; notes for lectures and talks, 1969-1979; an unpublished typescript 'Arwystli through the ages', [mid-late 20th century]; card index of timber-framed buildings in Montgomeryshire; offprints of articles on the archaeology and history of Montgomeryshire; reviews, correspondence and notes relating to his publications, 1949-1975; guides to castles and ecclesiastical buildings, [1970s]; correspondence, leaflets, press cuttings and other material relating to Cambrian Archaeological Association, Society of Antiquaries, Powysland Club and other bodies, 1948-1980; personal papers, including correspondence; records relating to Llanidloes parish church, 1906-1980; and records relating to the Glanyrafon estate, Montgomeryshire, 1866-1899.

Deeds and other documents, [16 cent.]-[19 cent.], collected by James Coleman, relating to Anglesey, Brecknockshire, Cardiganshire, Carmarthenshire, Caernarfonshire, Denbighshire, Flintshire, Glamorgan, Merionethshire, Monmouthshire, Montgomeryshire, Pembrokeshire, and Radnorshire, in Wales; and Cornwall, Cumberland, Gloucestershire, Herefordshire, Lancashire, Shropshire, and Suffolk, in England.

Deeds, 1542-1797, relating to properties in Glamorgan, Brecknockshire and Carmarthenshire; memorandum book of ?Samuel Owsley and William Owsley of Brecon, with notes on rents, taxes and local events and history, 1679-1768; fragment of an antiphonal, [15th century]; a copy of The Reports of Sir Henry Hobart, Lord Chief Justice of Common Pleas, 1650; and a copy of The Larvae of the British Lepidoptera and their food plants, 1880.

A volume of sermons lettered 'Pregethau Cymraeg 4'. The sermons were preached at the following places: Rumney, 1747-1751, Llanedern, 1748-1756, St. Mellons, 1749-1754, Llanvihangel y Vedw, 1754-1759, Llanhennock, 1762-1773, Malpas, 1759-1767, Caerleon, 1759-1770, Aberyskir, 1748-1752, Battle, 1750-1751, and Trallong, 1750-1751.