Transcripts of baptism, marriage and burial registers of churches in Glamorgan, comprising the parish churches of Penrice St Andrew, Bettws St David, the Chapelry of St Ellteyrn, Reynoldston St George, Caerphilly St Martin, Cardiff St Mary, Neath St David, Neath St Thomas, and Llandyfodwg St Tyfodwg, together with the registers for Charles Street Congregational Chapel, Cardiff, and Windsor Place Presbyterian Chapel, Cardiff.

Albums of press cuttings (from the Central Glamorgan Gazette, Chronicle for South and Mid-Glamorgan, Barry Herald, etc.) compiled by 'Ioan Trithyd'. They consist largely of the compiler's own press contributions, in the form of poetry of local interest, 'Llith yr Hen Bacman', 'Llith Wmffra Llwyd', 'Ymweliad a Llanwrtyd', 'Hanes Llantrithyd ...', etc.

Extracts and notes, mainly by Charles Ashton, wedding stanzas, folk-lore, notes on Glamorgan, etc.

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.

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

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.

A collection of autograph original poems and translations by Nathan Dyfed, with press cuttings of poems, mainly of Glamorgan interest, by him and by other authors.

Records relating to Newport West Conservative Association, 1917-1989, comprising minute books, 1917-1982, including those of the Women's Branch, 1926-1982; ward minutes, 1939-1967; account books, 1925-1978; and miscellaneous papers comprising a scrapbook of political leaflets, pamphlets, circulars, cuttings, etc., 1938-1947, electoral registers, 1988-1989, and copies of outgoing letters from the chairman, 1973.

A transcript by Llywarch Reynolds of NLW MS 918, which is an essay entitled 'Dyfodiad Fitzhamon i Forgannwg'.

Nearly two hundred autograph letters, 1855-1891, relating mainly to Welsh literary matters, and especially to Glamorgan, 1855-1899, to Jonathan Reynolds ('Nathan Dyfed') from contemporary Welsh poets and authors; miscellaneous poems; printed broadsides; press cuttings; etc.

Constituents' correspondence, 1984-1990; general correspondence, 1982-1990; subject files, 1972-1990; Foreign Affairs Committee, 1991; correspondence and press cuttings relating to the Miners' Strike, 1984-1985; and pamphlets, 1984-1987.

Papers of Edgar Leyshon Chappell, 1772-1951, including housing and public health records, 1901-1930; records relating to the South Wales Regional Survey Committee, 1920-1921; Industrial Unrest Commission records, 1904-1917; Agricultural Wages Board enquiry and research records, [c. 1918]-1940; records relating to local government and post-war reconstruction, 1891-1945; records of Melingriffith Tinplate Works, 1772-1948; papers relating to Daniel Lleufer Thomas, 1919-1941; scrapbooks, 1910-1944; and newspaper cuttings, 1896-1923.

A collection, made by Ebenezer Williams ('Gwernyfed', Merthyr Tydfil, died 1913), of penillion, 'tribannau', and ballads, mainly of Glamorgan and Brecknockshire interest, with three letters from 'Gwernyfed' to Edmund J. Jones.

An essay entitled 'Dyfodiad Fitzhamon i Forgannwg'.

Deeds and documents relating to Trimsaran Coal, Iron and Steel Company, [c. 1861]-1872; Ynisarwed Resolven Colliery Company, 1866-1875; and Yniscedwyn Iron, Steel, and Coal Company, 1837-1875; and copies of Court Rolls of the Manor of Evenjobb, Radnorshire, 1798-1851.

Papurau Pennar Davies, 1913-1999, yn cynnwys copïau teipysgrif o'i weithiau llenyddol, ynghyd â phapurau academaidd a phapurau llenyddol.

Manuscripts and documents collected by and created by John Roberts Hughes, 1727-1961, including, papers relating to the Quakers, including transcribed extracts from records, collected volumes and items of Quaker interest, and notes on the Quakers by J. R. Hughes; various papers collected and written by J. R. Hughes relating to folk-lore and local histories; notes for addresses and lectures; papers and documents created by others, acquired or purchased by J. R. Hughes; deeds relating mainly to Glamorgan and Monmouthshire, and other miscellaneous deeds; together with personal memoranda by J. R. Hughes and family papers.

Papers collected by John Jenkins, mainly records of the manors of Neath Ultra and Cilybebyll, Glamorgan, 1632-1831; and deeds relating to Glamorgan and Brecknockshire, 1546-1933.

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.

Papurau o eiddo, ac yn ymwneud â William Rhys Jones ('Gwenith Gwyn'), 1750-1947, y cyfan bron yn ei law ei hun, yn cynnwys: nodiadau ar hanes lleol yng Nghymru, enwau lleoedd, llên gwerin, a hynafiaethau (yn cynnwys cryn deunydd, ar ffurf nodiadau, traethodau, anerchiadau, adysgrifiadau, a thorion o'r wasg, ar gymeriadau, traddodiadau, a chymdeithasau hanesyddol, llenyddol a diwydiannol Dyffryn Ceiriog, Morgannwg, Maldwyn, Ceredigion ac Arfon); deunydd crefyddol (pregethau a nodiadau pregethau, traethodau ac anerchiadau ar yr Eglwys Gristnogol ac ar wahanol agweddau ar ei gweinidogaeth; papurau'n delio ag enwad y Bedyddwyr yng Nghymru, yn enwedig ym Morgannwg; nodiadau ar destunau Beiblaidd; nodiadau, anerchiadau coffa, a deunydd bywgraffiadol ar amrywiol gymeriadau crefyddol, Cymry yn bennaf; a geiriadur o dermau Beiblaidd a ddefnyddiwyd yng nghapeli Anghydffurfiol Cymru); cyfansoddiadau llenyddol (yn cynnwys barddoniaeth, storiâu byrion, nofelau, a dramâu, mewn drafft ac yn orffenedig; a darlithoedd, nodiadau a thraethodau ar bynciau llenyddol, hanesyddol, gwleidyddol, a chymdeithasegol); nodiadau ar anthropoleg, ethnoleg, pensaernïaeth a daeareg, yn cynnwys geiriadur Cymraeg-Saesneg o dermau daearegol; y diwydiant llechi yng Nghymru; deunydd ar ramadeg a statws gwleidyddol yr iaith Gymraeg; nodiadau ar wahanol ieithoedd estron a thafodieithoedd, yn cynnwys iaith y Beibl; deunydd bywgraffyddol yn ymwneud â Gwenith Gwyn a'i wraig, 1885-1937; catalog o lyfrau yn ei lyfrgell; torion o'r wasg,1922-1928; a llyfrau lloffion, yn ogystal ag erthygl papur newydd amdano gan y Parch. W. J. Rhys, Abertawe,1947); ei gopïau o weithiau printiedig, 1750-[20fed ganrif]; a deunydd, printiedig neu fel arall, a ysgrifennwyd gan bobl heblaw Gwenith Gwyn = Papers of and relating to William Rhys Jones ('Gwenith Gwyn'), 1750-1947, nearly all of which are in his own hand, comprising: notes on Welsh local history, place-names, folk culture, and antiquities (including considerable material, in the form of notes, essays, addresses, transcripts, and press cuttings, on the personalities, traditions, and historical, literary and industrial associations of Dyffryn Ceiriog, Glamorgan, Maldwyn, Ceredigion and Arfon); religious material (sermons and sermon notes, essays and addresses on the Christian Church and on various aspects of its ministry; papers dealing with the Baptist denomination in Wales, particularly in Glamorgan; notes on Biblical texts; notes, in memoriam addresses, and biographical material on various religious personalities, mainly Welsh; and a dictionary of Biblical terms used in Nonconformist chapels in Wales); literary compositions (comprising poetry, short stories, novels, and plays, in both draft and final form; and lectures, notes, and essays on literary, historical, political, and sociological topics); notes on anthropology, ethnology, architecture and geology, including an English-Welsh dictionary of geological terms; the Welsh quarrying industry; material on the grammar and political status of the Welsh language; notes on various foreign languages and dialects, including Biblical tongues; biographical material relating to both Gwenith Gwyn and his wife (including bills and receipts; diaries for 1923, 1936, and 1937; letters received, 1885-1937; a catalogue of books in his library; press cuttings, 1922-1928; and scrap-books, as well as a newspaper article about him by Rev. W. J. Rhys, Swansea, 1947); his copies of printed works, 1750-[20th cent.]; and material, printed or otherwise, written by persons other than Gwenith Gwyn.

Casgliad bychan o bapurau ychwanegol gan gynnwys llyfrau nodiadau. Nid yw'r rhain wedi eu catalogio eto.