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.

A volume, 1906-1907, containing a printed summary of evidence of the Diocese of St Davids to the Welsh Church Commission, and typescript copies of nonconformist statistics for the counties of Anglesey, Caernarfonshire and Carmarthenshire.

Professional papers of Ywain Goronwy ap Griffith comprising agreements, specifications, plans and correspondence, 1927-53, mainly relating to the alteration, repair and erection of new buildings, both private and public, in Merionethshire, Montgomeryshire and Caernarfonshire; files relating to work done in the diocese of Bangor, mainly in the form of alterations and repairs to vicarages, 1932-1952; and papers, 1920-40, relating to the redemption of tithe rent-charges in various parishes of Anglesey, Caernarfonshire, Cardiganshire and Merionethshire.

Deeds collect by J. Augusta Berry, mainly relating to properties in Glamorgan, Pembrokeshire and Carmarthenshire, 1753-1865.

Collection of deeds acquire by D. Gethin Williams, relating to properties in Carmarthenshire and Glamorgan, 1687-1889.

Two volumes entitled 'Hen Gofion. Yr Ysgrepan neu Wyau Nythau Nathan', being a collection of autobiographical and other material compiled by Nathan Dyfed. The volumes include, in addition to the autobiographical material, notes and reminiscences relating to Glamorgan, its people and customs, a vocabulary of the Dyfed dialect, notes on 'eisteddfodau' mainly in Glamorgan, 1831-1888, an account of friendly societies in the Merthyr Tydfil district, poetry by Nathan Dyfed and others, a copy of Gwallteriana: sef y traethawd buddugol gan ... Walter Davies ... ar ansoddau gwahanol ddosbarthau barddonol Caerfyrddin a Morganwg ... Cyfieithiedig gan Jonathan Reynolds ... (Treherbert, 1879), etc.

Deeds, 1609-1873, mostly relating to lands in Carmarthenshire, including the Trimsaran estate; records of the Commissioners of the Kidwelly and Llanelli Canal and Tramroad Act, 1813-1834; and deeds and records of the Llanelli Canal and Tramroad Company, 1834-1839. The fonds does not contain any records relating to the Carmarthenshire Antiquarian Society.

Papers, 1907-1988, mainly relating to the activities of the Labour Party in Carmarthenshire and Cardiganshire, 1917-1967, including: papers of the Llanelli Trades Council and Divisional Labour Party, including minute books, 1940-1967; accounts, financial papers and cash books, 1925-1967; correspondence, 1921-1967; miscellaneous papers, 1917-1967; press cuttings, 1926-1959; and general election papers, 1931-1964; political and professional papers of Loti Rees Hughes, including correspondence, minute books and press cuttings, 1927-1965; and personal and family papers, 1935-1969; papers of W. Douglas Hughes [c. 1920]-1968, including correspondence, 1932-1967; notebooks, c. [1920]-1966; and correspondence and papers relating to Carmarthenshire County Council, 1944-1968; together with the papers of Dr Deian R. Hopkin, 1907-2000, including correspondence, 1962-2000; and miscellaneous printed material, with some concerning the Labour Party, 1907-1984 and the University College of Wales, Aberystwyth, 1960-1973.

Deeds and documents, 1553-1877, relating to properties in the parishes of Llandysilio, Llanfyrnach, Llanbedr Felffre, Lamphey and Mathri, co. Pembroke; Llanfihangel-ar-arth, Carmarthen town and borough, Llan-gain, Abergwili, Llanfihangel Rhos-y-corn, Newchurch, Llanfihangel Abercywyn, Llanybydder, Llanwinio, Tre-lech a'r Betws, Llanboidy, Aber-nant, Llangynnwr, Meidrim, St. Clears, Llandeilo Fawr, Llandybie and St. Ishmael, co. Carmarthen; Bangor [Teifi], Cellan and Caron, co. Cardigan. They include deeds for the Glandewely estate in Llanfihangel-ar-arth, 1553-1769, and the Golden Lion in Lammas Street, Carmarthen, 1771-1877.

Title deeds and other documents of depositor's clients, 1557-1939, relating to properties in Brecknockshire, 1557-1939, in particular to the Little Bell, Brecon, 1759-1883, and to the Pant Griffith estate, Merthyr Cynog, 1705-1856; in Glamorgan, 1731-1920, including the Court Rhyd-hir estate, 1731-1920; and in Radnorshire, 1639-1800, Monmouthshire, 1756-1834, and Herefordshire, 1557-1763.

Ymhlith y torion ceir 'The Labour Candidature: an appeal to the Electorate of Pembrokeshire', 1922, a gyhoeddwyd yn nhri o bapurau lleol y sir, ynghyd â fersiwn llawysgrif; 'A Welsh state. The new Nationalism', South Wales News, 1924; 'Carmarthen Borough Education Committee and the Welsh language', llythyr at olygydd The Welshman, 1924; 'Nodion y Cymro a'r Blaid Genedlaethol', The Labour News, 1925; 'The new Welsh Nationalism', Manchester Guardian, 1926; a 'Sir Gaerfyrddin-ar ddiwrnod garw', Heddiw, Hydref-Tachwedd 1941.

Family papers and estate records of the Evans and Davies-Evans families of Highmead, Cardiganshire. -- The estate records includes rentals and inventories of the estates of Highmead, 1800-1890, Penylan in the parish of Llanfynydd, Carmarthenshire, 1817-1850, Dolgadfan and Trefeglwys in Montgomeryshire, 1850-1859, and Pantglas in Carmarthenshire, 1879-1897, and of the estate of James Evan Bayly in the parish of Llanwenog, Cardigan, 1822-1840; account books of the Highmead estate, 1757-1899; records of various estates and farms in Carmarthenshire, and Breconshire; and deeds of estates in Breconshire, Cardiganshire, Carmarthenshire, Glamorgan, Pembrokeshire and Radnorshire, 1549-c. 1880. -- The family and personal papers include the diaries of Anne Evans, John Jones of Blaenos, the Rev. D. H. T. G. Williams, Herbert Davies-Evans, and his son H. Davies-Evans, 1790-1891; pedigrees of, and biographical notes on, the Davies-Evans family and the Llwynhelig family and other genealogical records, family and business letters, late 18th-20th centuries; legal precedents, agricultural memoranda, press cuttings, school exercise books, drawings and sketches, a large body of letters received by Major Herbert Davies-Evans, and miscellaneous papers relating to his service in the militia and in the South African War, 1891-1903 and a group of letters addressed to Anne Evans, 1786-1802. -- Other papers include election papers for Cardiganshire and Carmarthenshire, 1802-1841; returns and orders of the Carmarthenshire Yeoman Cavalry, 1804-1809; accounts of overseers of the poor and vestry minutes for Llanwenog, 1805-1817; court leet records of the manors of Mabedrid and Mabelview, Carmarthen, 1811-1836; Carmarthenshire turnpike records, 1822-1830; and the log books of four ships, kept by H. D. Evans, 1856-1858.

Papers of J. Glyn Picton, 1949-1991, mainly papers concerned with his researches into General Sir Thomas Picton (1758-1815) and the Picton family, 1951-1991, including correspondence, 1949-1977; notes, 1951-1975; copies and transcripts of probate record and Pembrokeshire plea rolls; photographs and news cuttings, 1975-1984; and copies of printed sources; with also records, articles and lectures reflecting J. Glyn Picton's public service in the fields of national health and industrial relations, 1951-1977.

Notebook, 1749-1777, of Samuel Deykin of Carmarthen, including a journal of his travels to London and Barnsley, March-June 1950; an imaginary journal for 1746, had Charles Edward Stuart acceded to the throne (ff. 11-16); topical verse, miscellaneous notes and memoranda, and religious meditations.

Records and court rolls, 1832-1936, mainly relating to the manors of Anhuniog, Creuddyn, Cyfoethbrenin, Mebwynion, Mefenydd, Perfedd, Tal-y-sarn and Silian, in Cardiganshire, 1874-1936, and the manors of Caeo, Catheiniog, Glyncothi and Bwlchcymbyd, Mabelfyw, Mabedrud, Maenordeilo, Mallaen, Pennant Forest and Talley, in Carmarthenshire, 1883-1934; copies of surveys of Talley, 1832; and miscellaneous documents, 1842-1858.

Deeds relating mainly to Cardiganshire and Carmarthenshire, 1782-1951, including deeds of the Johnes family of Hafod, Cardiganshire, and rentals of manors in Cardiganshire and Carmarthenshire, [c. 1891]-1925, including the manor of Tal-sarn and Silian, [c. 1891]-1916.

Records of Messrs David and David, comprising records of valuations of properties in South Wales and the adjoining counties of England made during the period 1846-1933, including Breconshire, 1872-1912; Carmarthenshire, 1865-1884; Glamorgan, 1846-1926; Monmouthshire, 1867-1933; Gloucestershire, 1875-1880; Herefordshire, 1874-1881; and Somerset, 1876-1885. The records include surveys, reports, valuations, correspondence, notes, plans, valuation schedules, sale notices and copy agreements. Many of the records reflect the industrial and urban development of South Wales and quite a number of the individual valuations are of land subject to compulsory purchase by railway companies and public utilities.

Deeds and papers accumulated by D. Roy Evans, comprising the papers of Mrs A. A. Puddicombe (Allen Raine), including manuscripts of her work, [1894x1908] and an eighteenth-century manuscript formerly belonging to her; newspaper cuttings relating to the death of, and the inquest upon, Sarah Jacobs of Llether-noyadd-ucha, Llanfihangel-ar-arth, co. Carmarthen, the Welsh fasting girl, 1869-1870; a copy of Mercvrivs Avlicvs, communicating the intelligence and affairs of the Court, to the rest of the Kingdom. From May to May 11, 1645, recording the victory of General Charles Gerard over Major-General Laugharne before Newcastle Emlyn; and deeds and documents relating to properties in the parish of Laugharne, 1609-1756, and to properties in the counties of Cardigan, Carmarthen, and Pembroke, 1695-1900.

'Farming Book of Malvre and Pibwr-Wen ...', 1835-1836 and 1862.

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.