A journal, 1818-1836, with full details relating to his work and activities, receipts and payments, etc. kept by a Carmarthenshire farmer, possibly David Thomas (1756-1840), Llwynywermwd, Llanycrwys, son of Zechariah Thomas (1727-1816), Baptist minister.

A manuscript containing another version (see NLW MS 2169B) of Evan Lewis's (d. 1864) Dydd y Pethau Bychain; accounts of a day school at Llangybi, 1857-1859, and of payments for lodgings, 1858-1864.

Deeds and documents concerning lands in Evenjobb, in the parishes of Old Radnor and Presteigne, Radnorshire, 1631-1894; bonds and quitclaims of moneys, 1715-1766; Inland Revenue accounts, 1903-1905, of duty payable on the estate of Thomas Duggan Stephens; and documents relating to Upper Rowley Farm, 1923-1970.

Deeds relating to Llancarfan and elsewhere in Glamorgan, 1604-1705.

A bill for services rendered, 18 January 1871, in the hand of Dr William Price, Pontypridd, and addressed to the Rev. Dr Rees [?Henry Rees].

Papers, correspondence and press cuttings relating to Ireland, 1926-1978; Plaid Cymru, 1929-1965; Welsh political, economic and social affairs, 1931-1962; Pantybeiliau Folk School, 1933-1938; world economics, socialism and communism, 1934-1951; and Brittany, 1946; and personal papers, including correspondence, 1924-1978, diaries, 1921-1979, and academic papers, 1922-1946.

Deeds and other documents, 1630-1886, relating mainly to the Powell family of Maesgwyn and to the parishes of Diserth, Llansanffraid-yn-Elfael, Llandegla and Glasgwm, Radnorshire, 1630-1886; and to properties of the Jones family of Bryncynfelyn in the parish of Llanfechain, 1651-1782.

Correspondence and research notes of Dr. A.W.L.Seaman relating to politics in Merthyr Tudful before 1914, comprising correspondence and papers relating to the biographies of three members of parliament for Merthyr Tudful (c. 1880-1914), namely William Pritchard-Morgan, Keir Hardie, and Edgar Jones (including letters from Edgar Jones, 1960-1961,) and newspaper cuttings and ephemera relating to the Merthyr Tydfil parliamentary election, January 1910.

Deeds and papers collected by Douglas J. Elliott, mainly relating to the Jones of Glanyrafon-ddu family and to properties in Llansadwrn, Pencarreg, and Talley, Carmarthenshire, 1767-1869; and typescript copy of the parish register of Gwaenysgor, Flintshire, 1713-1760, [20th century].

Trwyddedau pysgota, 1916-32, Miss K. Monica Davies, Glasynys, Dolwyddelan, sir Gaernarfon; ynghyd â chardiau aelodaeth, 1919-23, Cymdeithas Bysgota Dolwyddelan, a alwyd yn 'Cymdeithas Enweiriawl Dolwyddelan' / Fishing licences, 1916-32, of Miss K. Monica Davies, Glasynys, Dolwyddelan, co. Caernarfon; together with membership cards, 1919-23, of the Dolwyddelan Angling Association, known as 'Cymdeithas Enweiriawl Dolwyddelan'.

Title deeds and family papers of the Owen family of Garthangharad, Dolgellau, Merioneth, 1539-1909, papers and correspondence of the legal practice of Edward Owen, 1799-1852, and deeds and estate correspondence of the Hengwrt, Rhug and Nannau estates, mainly 1824-1858.

Deeds, 1447-1829, relating mainly to properties in the parishes of Bedwellty, Trevethin, Aberystruth, and Mynyddislwyn, Monmouthshire; records of the parish of Mynyddislwyn, Monmouthshire, 1782-1848; pocket-books of David Davies of Penyvan, 1794-1848; and accounts, 1782-1817.

A photostat facsimile of the parish register, 1734-1812, of Disserth, Radnorshire, recording baptisms, marriages, and burials.

Mansfield's Commercial Diary, 1853, with manuscript entries and memoranda, 1853-5, of a Monmouthshire? brewer, largely relating to the recovery of debts.

Dyddiadur yr Annibynwyr, 1846, 1852, 1855-7, 1864, 1867, 1871-1873, with farming and personal entries by John Thomas, Tynlon, Llangybi, co. Caernarvon.

The series comprises diaries detailing farming activities on the farms of Penyffridd, 1883-1891, Felindre, 1892-1914, Cil, 1926, all in Berriew, Wales, and Lower House farm, Little Ness, England, 1933. 1/1-5, 1/8 also include notes on the sermons of Rev. E Thomas at Byrwyrdd chapel, Castle Caereinion, Wales.

A scrapbook of press cuttings, 1973-1975, together with loose cuttings and a leaflet, 1968-1979, relating to the devolution question in Wales and the campaign for a Welsh Assembly.

A copy of Pasiant yr Ysgol Sul, Rhostryfan, held 1 August 1929 and written by William Gilbert Williams, together with photographs of the several characters taking part.

Two tracts - (a) a description of England, in fifteen chapters, compiled in 1445, beginning 'tractatus iste compendiose extractus de diversorum historiographorum diversis ... describit Angliam ... '; (b) a genealogical chronicle in the same hand projected from Adam to Brutus and from Brutus to Henry VI, but in execution brought only to Edward I, with a continuation in a sixteenth century hand to Henry VIII (1518). The pattern of this genealogical chronicle is that of the Promptuarium Bibliae attributed to Petrus Pictaviensis. The text begins 'Adam in agro damasceno ...' (cf. Thomas Jones, Y Bibyl Ynghymraeg (Cardiff, 1940), p. xiii) and has lines added for the Saxons, kings of Britain, princes of Wales, the different divisions of Saxon England, kings of England, princes of Demetia, princes of Venedotia, &c.

Title deeds, 1525-1907, of the Derwydd estate, mainly in Carmarthenshire, and of the families of Vaughan of Golden Grove and Llanelli, Bevan of Laugharne (including Madam Bridget Bevan, 1698-1779), Stepney of Llanelli, and Stepney-Gulston of Derwydd. There are no personal or family papers in the archive.