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.

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.

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.

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.

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

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

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

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.

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.

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.

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.

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.

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.