Records relating to the Brigstocke family, including deeds of properties in Carmarthenshire and Pembrokeshire prior their acquisition by the Brigstockes, 1496-1889; deeds and documents of members of the Brigstocke family, 1655-1912; miscellaneous deeds, documents and papers relating to the Brigstocke family and lands in Carmarthenshire, including the Dolhaidd estate, 1846-1892, Cenarth, 1741-1838, and Llandyfaelog and Kidwelly, 1772-1833; legal papers, 1751-1775; and deeds and documents collected by W. Evans George relating to other estates, including: papers of the Lewes family of Gellidywyll, mostly bills and receipts, 1741-1792; draft deeds of W. Evans George for property in the Lower Teifi Valley, Cardiganshire and Carmarthenshire, 1896-1922; sale and account books of W. Evans George and Sons, 1863-1884; printed material, 1837-1925; papers concerned with local elections in Cardiganshire, 1741-1937; weekly account book of the surveyor of the South Wales Highway for Llanfihangel-ar-arth, 1866-1873; records of the Court of Petty Sessions, Penrhiw-pal, Cardiganshire, 1903-1927; and records of the Newcastle Emlyn Town Improvement Committee, 1903-1906.

A volume containing transcripts and abstracts made for Sir John Williams (1840-1926), under the supervision of Dr E. A. Lewis (1880-1942), of historical material relating to the abbey of Whitland and the castle, town, lordship and priory of St Clears.

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.

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.

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.

A Carmarthenshire under-sheriff's book of 1737 containing particulars of writs issued by himself and others during the year 1736-1737.

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

Deeds, mainly relating to Cardiganshire and Carmarthenshire, 1668-1757.

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 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 and documents relating to the estate of the Brock family in Carmarthenshire, 1843-75, and others, 1774-1900; and other deeds and documents, 1774-1900.

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.

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.

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

Financial records and correspondence of the Association, 1913-1955; annual reports, 1880-1957; account book and Annual Reports of the Association's Home Mission 1895-1953; and financial and other papers of the Young People's Association, 1948-1953.

Deeds, 1759-1862, relating to properties in the parishes of Llandingad, Llanfair-ar-y-bryn, Llangadog, Llansadwrn, and Myddfai, and the town of Llandovery, Carmarthenshire; and accounts, 1847-1849, of a Carmarthen draper.

Papers accumulated by Morgan Henry Williams including manuscript reminiscences [? of himself]; typescript scripts of radio programmes, 1938-1946, and contracts, 1951-1960, with the BBC relating to broadcast talks; and letters, 1894 and 1916.

An interleaved copy of A Calendar of all the High-Sheriffs for the County of Carmarthen, and of all the Mayors, Bailiffs, and Sheriffs, of the Corporation of Carmarthen from ... 1400 to 1818; and also, a correct list of all the present Burgesses of the Borough, 1818, with notes and additions by David Griffiths, Galltverin and William Gwynne Stedman Thomas, together with a copy of Charter of Confirmation, for the Borough of Carmarthen, 1812.

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.