Account book, mainly in Welsh, 1867-1907, of Thomas Jones (d. 1897), Brynmeheryn, Ystradmeurig, co. Cardigan, containing customers' accounts for weaving, sometimes with details of patterns; also included are a few veterinary recipes. Later entries are in the hand of Evan W. Jones, possibly the son of Thomas Jones.

Account book, 1887-1916, of Thomas Jones, Pant-teg, Bronnant, co. Cardigan, weaver, with a few later memoranda, 1921-1924, mostly concerning machinery, by his son E. D. Jones. Note on 'Patrwn Carthen Felinfach' inside back cover.

A manuscript containing an account of money gifts received by Richard and Elizabeth Davies (probably of Carmarthen) on their wedding day, November 19th, 1811, and of gifts 'repaid' by them.

A volume containing a transcript of Griffith Jones, Welch Piety for 1751-1752 (London, 1753) and of part of the Welch Piety for 1753-1754 (London, 1755) and 1756-1757 (London, 1757) (ff. 1-138); extracts relating to the history of religion in Wales (ff. 139-232v) mainly from published works but a few extracts from manuscripts of H. T. Edwards, dean of Bangor (see ff. 149v, 168v-9v, 171v-2, 188. 201v); and extracts from Panton MSS 41 and 57 (ff. 234-343). Most of the volume appears to be in the hand of the Reverend David Jones, biographer of Dean Edwards and author of Life and Times of Griffith Jones sometime Rector of Llanddowror (London, 1902) and the dates 1889 (ff. 198, 201, 202v) and 1891 (ff. 332, 343, 'Copied by me D. J. ...') occur.

Series contains papers related to Welsh affairs, including devolution of the legal system, campaigns for devolution, higher and further education and parliamentary work on Welsh issues.

A List of Catholics connected with Wales who suffered death for the Faith, 1539-1680 A.D., with an addition and a corrigendum in manuscript by Thomas Peter Ellis.

Papers of, and acquired by, the Welsh Church Commission, 1283-1960, including records of the Commission, 1914-1960; records relating to border parishes, 1914-1915; accounts, 1920-1958; papers relating to Sir Alfred Watson, 1916-1941; records concerning compensation to lay holders of freehold offices, 1915-1931; records relating to burial grounds, 1934-1947; records relating to the destination of records, 1914-1960; records relating to parish lands, 1844-1946; manorial records and court books, 1842-1925; transfer of documents, 1822-1947; deeds of properties, 1566-1929; and rentals and surveys, 1919-1947.

Notes, letters, illustrations, press cuttings, broadsides, circulars, etc., relating to Welsh harps, harposts, and Welsh and Irish music, collected by Thomas Price (Carnhuanawc).

Legal files relating to the court cases of members of the Welsh Language Society, [1968]-[1971]. = Ffeiliau cyfreithiol yn ymwneud ag achosion llys aelodau Cymdeithas yr Iaith Gymraeg, [1968]-[1971].

A short bibliography of Welsh music from 1530 to 1795, compiled by 'Beuno'.

The collection consists of election addresses, leaflets, circulars and other printed matter, 1837-1999, generally acquired before the establishment of the Welsh Political Archive; election addresses, leaflets etc., 1905-2024, collected by the WPA; and printed materials, 1887-2025, concerning the political parties in Wales, various pressure groups and organisations, subject files, and other miscellaneous papers.

Records accumulated by Dr John Herbert, 1968-1984, comprising Welsh Secondary Schools Association records, minutes and papers, 1968-1984; and Headmasters' Association and Secondary Heads Association minutes, correspondence, discussion papers and related material, 1969-1984.

A photostat facsimile of the parish register of Wenvoe, Glamorgan, 1585-1739.

Deeds, 1557-1808, relating to premises mainly in Carmarthenshire, with some in Montgomeryshire, Cardiganshire and Flintshire, and a small number in other Welsh counties.

Deeds relating mainly to Carmarthenshire, 1531-1857, and to other Welsh counties including Brecknockshire, 1655-1800, Cardiganshire, 1628-1819, Glamorgan, 1673-1792, Monmouthshire, 1636-1795, Montgomeryshire, 1675-1702, Pembrokeshire, 1724-1811, and Radnorshire, 1689-1773. There is no apparent connection between the deeds.

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

Autograph draft, 1932, of 'With the Romans to the West', an apparently unpublished essay by William Evans on Roman roads in Anglesey.

The first of three volumes (see also NLW MSS 23702-3D) of typescript and manuscript accounts by women from Wales of their experiences in the Second World War, selections from which were published in Parachutes and Petticoats: Welsh Women Writing on the Second World War, ed. by Leigh Verrill-Rhys and Deirdre Beddoe (Dinas Powys, 1992). The material was submitted in response to an appeal in 1991 by the publishers, Honno. A copy of the complete archive has been donated to the Imperial War Museum, London.