Account book of Wern Welsh Congregational church, Ystalyfera, co. Glamorgan, containing general accounts and miscellaneous memoranda, 1894-1911.

A minute-book, 1905-1925, of Ebenezer Welsh Baptist church, Merthyr Tudful, co. Glamorgan.

The original manuscript score of a cantata - 'Gwarchaead Harlech' - by Joseph David Jones, Ruthin (1827-70).

An extract translated into staff notation by Arnold Dolmetsch from British Museum Additional MS 14905, 29 January 1935.

Cân newydd yn gosod allan y modd y darfu Huw Prys a John Shon, dau o bysgotwrs glan Afon Dysynni yn Sir Feirionydd, orfodi hen Dori cydwybodol i addaw pleidleisio o blaid yr Yswain Dafydd Williams, Castell Deudraeth, yn etholiad 1868, the song possibly by Edwin Jones, Tywyn (Meirionnydd), afterwards of Aberystwyth.

Records of the Cambrian Archaeological Association, including minute books, 1847-1989; committee attendance books, 1920-1975; agenda books, 1921-1947; correspondence, 1846-1989; treasurer's records, 1895-1982; members' papers and registers, 1930-1988; general secretary's papers, 1958-1989; conference papers, 1967-1983; and publication records, 1931-1988.
Additional records of the Association, 1989-1998, were received. This group remains uncatalogued.
Further records of the Cambrian Archaeological Association were received. These remain uncatalogued.
CAA records received as a Bequest from Donald Moore per Christopher Moore, April 2015,9 large archive box.

'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 the year of Our Lord 1400 to 1818 ...'; genealogical notes and tables largely of South Wales families, with numerous notes and annotations by Stedman Thomas; etc.

A volume containing a rental of the corporation of Caernarvon, 1832-1838, a rental of crown quit rents in the borough of Caernarvon, 1834-1846, an account of quarterly payments of gas tenants, 1833, and mortgage accounts, 1830-1835.

A rental of crown quit rents within the borough of Caernarvon, 1847-1856.

Court rolls (town courts, piepowder courts, courts of the fairs, and great tourn courts), 1361-1402, of the borough of Caernarfon. The rolls were transcribed and translated (with an an introduction) by Gwilym Peredur Jones and Hugh Owen, in Caernarvon Court Rolls 1361-1402 (Caernarvonshire Historical Society Record Series No. 1; Caernarfon, 1951).

Deeds, 1624-1751, relating to properties in Radnorshire and Herefordshire

Deeds and documents, 1719-1855, relating mainly to the Peniarth estate in Merionethshire and Caernarfonshire, mainly leases, bonds and mortgages, 1728-1767.

Deeds, mostly relating to the estate of the Burchinshaw family, Denbighshire, 1668-1750, and the Tremadog, Caernarfonshire, estate of the Roche family, 1895-1900.

Deeds, 1564-1857, relating to the Bachegraig estate, Flintshire; brief diary entries of Gabriel and Hester Lynch Piozzi, 1797-1812 (NLW MSS 11096-102); correspondence, 1756-1823 (NLW MS 11103D); heraldic and genealogical records, 1813 (NLW Rolls 223); and a survey and valuation of the Bachegraig estate, 1790, which also includes accounts, 1788-1807 (NLW MS 11104C).

An incomplete transcript of 'Chronica Principum Walliae' or 'Brut y Tywysogion', probably based on the text in 'Llyfr Coch Hergest' and bearing a close resemblance to the text found in Peniarth MS. 212, and a transcript of another chronicle from Cadwalydr Vendigeid to A.D. 1565.

Deeds relating to the Pit, Dorstone, Herefordshire, and to Brook House, Llanigon, Brecknockshire, 1754-1965; and deeds relating to a cottage in Llanigon, 1854-1898.

Correspondence and papers relating to Clifford McLucas' installation 'Bro' at the 2002 National Eisteddfod at St. David's, comprising mainly publicity material, printed booklets, notes, sketches and designs, administrative and financial papers.

Deeds, relating to properties in the following counties: Anglesey, 1737-1871; Cardiganshire, 1736-1780; Carmarthenshire, 1684-1838; Caernarfonshire, 1831-1878; Denbighshire, 1591-1837; Flintshire, 1465-1855; Glamorgan, 1597-1883; Merionethshire, 1793; Pembrokeshire, 1683-1857; and Radnorshire 1623-1816.

A draft tract entitled 'Proofes drawne from authorities and other reasons why Cadelh prince of Southwales was the eldest sonne of Roderic the greate (kinge of Wales) and that he and his issue after him had a superioritie over the rest of Wales and his two bretheren and the descendantes from them' by, and in the autograph of, Robert Vaughan of Hengwrt. The substance of this tract was subsequently incorporated in Vaughan's British Antiquities Revived (Oxford, 1662). The volume contains both the arguments and answers set forth by Vaughan and therefore differs considerably from Peniarth MS 277 which contains only the arguments.
Pasted inside the front cover is a short description of the volume in the form of a cutting from Messrs. Sotheby, Wilkinson and Hodge’s Sale Catalogue of the Mostyn Library (1919), p. 22.

Records relating to parliamentary elections for the county of Brecon, Brecknockshire, 1874-1880, apparently emanating from the Conservative Party organisation in the Crickhowell and Tal-y-bont Polling Districts.