Deeds, documents and probate records, 1617-1853, relating mainly to the parishes of Caerhun, Conwy, Dwygyfylchi, Gyffin, Llanbedrycennin and Llannor, Caernarfonshire, and to the Abbey estate, in Denbighshire, Merionethshire and Caernarfonshire, 1811-1819; notes on sermons, 1861-1889; and miscellaneous papers relating to Amlwch, Anglesey, 1801-1868.

Minute books, correspondence and papers, 1953-1992, relating to the Conservative Party in North Wales, including general political papers and circulars, 1971-1989; papers of the North Wales European Election, 1989; news sheets produced by the Brecon and Radnor Conservative Association, 1963-1972; papers relating to the training of constituency agents, 1970-1978; minutes and correspondence of the executive council of the Caernarvon Division of the Conservative and Unionist Association, 1953-1992; papers concerning the Pwllheli Conservative Club, the Association's Annual General Meetings, briefings and reports, 1982-1992; papers including minutes of the executive council and other committees; correspondence, circulars, memoranda, balance sheets of the Conway Constituency Conservative and Unionist Association, 1967-1982; minutes of the Llandudno Junction branch, 1951-1986; records of the Denbigh Constituency Conservative Association, 1974-1982; papers of the National Society of Conservative and Unionist Agents, both the National and Wales and Monmouthshire branches, 1970-1980; and minutes of the North Wales European Constituency Conservative Council, 1978-1989.

Papers of the Charles and Davies families of Brymbo, including verses, articles and notes by Daniel Davies, [c.1888]-[1920s], and scrapbooks containing material of Davies and Charles family and Brymbo area interest, 1841-[1960s].

Deeds and documents, 1280-1797, relating to Shropshire, Cheshire, Denbighshire, Flintshire, Montgomeryshire and Staffordshire, together with genealogical, heraldic and antiquarian notes, compiled c. 1745-c.1766 and [mid 19th cent.].

Papers of the Rev. E. K. Jones, 1780-1949, including correspondence, 1887-1931; family papers, 1891-1936; diaries, 1885-1936; sermons, [c. 1890]-[c. 1930]; press cuttings, 1885-[1930s]; papers relating to his publications, 1877-1950; and records collected by the Rev. Jones relating to baptism in Wales, 1780-1949, including records of the Welsh Baptist Union, 1896-1944; records of the Denbigh, Flint, and Merioneth Baptist Association, 1864-1949; Welsh Baptist yearbooks, 1843-1946, and sermons and papers relating to various Welsh Baptist ministers and chapels, 1780-1942.

Personal and political papers of E. T. John, 1881-1931, including correspondence, 1886-1931; personal and family papers, 1882-1930; political papers, 1907-1930; papers relating to Welsh and Celtic cultural movements, 1912-1930; posters and programmes, 1881-1927; and miscellaneous papers and publications, [c. 1894]-1930.

Deeds, 1507-[1839], mainly relating to Flintshire, and to a lesser extent to Denbighshire and Anglesey.

Papurau ymchwil yn ymwneud â'i draethawd MTh 'Bywyd a Gwaith William Williams o'r Wern 1781-1840' (Bangor, 1981) a'i draethawd MPhil 'Astudiaeth hanesyddol o Annibynwyr Siroedd Dinbych a Fflint 1863-1953 (Bangor, 1993),[1981]-1993 = Research papers relating to his MTh thesis 'Bywyd a Gwaith William Williams o'r Wern 1781-1840' (Bangor, 1981) and his MPhil thesis 'Astudiaeth Hanesyddol o Annibynwyr Siroedd Dinbych a Fflint 1863-1953' (Bangor, 1993), [1981]-1993.

Dros 600 o bregethau,1901-1963, y Parch. John Edryd Jones, sir Ddinbych.

Personal papers of Sir John Williams comprising notes, essays, lectures and transcripts by him, [19th century]-[early 20th century]; certificates and testimonials, 1858-1915; cards and letters from the children of King George V and invitation cards to royal functions, 1889-1916; documents relating to his various honours, 1894-1911; photograph and stamp albums, 1849-[early 20th century]; other photographs, [1840s]-1905; press cuttings, [c. 1870]-1926; letters collected by Sir John, 1633-1912; letters to him, 1879-1922, the correspondents including members of the Royal Family; deeds and other documents relating to properties in Llangadog, to Plas Llanstephan and to Harley Street, London, 1790-1918; bibliographical material, [19th century]-[20th century]; medical notebooks and other papers, 1855-1900; diaries of Sir John and Lady Williams, 1872-1925; estate and financial records, 1890-[1926]; papers relating to public affairs, 1870-1911; miscellaneous items collected by Sir John, 1795-[c. 1919]; personal possessions, including University and commemorative medals, insignia, medical equipment, and ceremonial trumpets, 1861-1913; and deeds collected by Sir John Williams, 1546-1869, comprising deeds of the Vaughan family of Llanelli, Carmarthenshire, the Penry family of Swansea, Glamorgan, and the Dalton family of Pembrey, Carmarthenshire, 1545-1677, relating to properties in Llangennech and Pembrey, Carmarthenshire; deeds of John Jones, Ystrad, Carmarthenshire, relating to Llansadwrn, Carmarthenshire, 1632-1793, and the borough of Carmarthen, 1611-1869; Wynn of Gwydir deeds, 1352-1797, relating mostly to Caernarfonshire, Merionethshire and Denbighshire; miscellaneous Welsh deeds, relating mainly to properties in Carmarthenshire and Cardiganshire, 1451-[c. 1840]; and miscellaneous deeds relating to England (mainly Cornwall and Staffordshire), Ireland, and Scotland, 1586-1896.

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.

Gohebiaeth, barddoniaeth, rhyddiaith a phapurau teuluol, yn ymwneud â J. W. Jones, 1878-1954, a'i dad, 'Glan Barlwyd', 1866-1917; deunydd a gasglwyd gan J. W. Jones yn ymnweud ag unigolion a sefydliadau yn ardal Blaenau Ffestiniog, gan gynnwys gohebiaeth, barddoniaeth a phapurau eraill o eiddo 'Gwilym Deudraeth', 1917-1939, 'Elfyn', 1874-1917, Y Parch. R. R. Morris, 1883-1933, 'Alafon', 1875-1915, 'Llifon', 1899-1916, 'Isallt', 1887-1913, a 'Glyn Myfyr', 1893-1937; llythyrau at John Daniel Davies yn rhinwedd ei swydd fel golygydd Y Rhedegydd, 1930-1942; barddoniaeth a phapurau eraill o eiddo T. Gwynn Jones, 1910-1944; barddoniaeth, [1840]-1940, gan amryw feirdd, yn cynnwys Hedd Wyn ac R. Williams Parry; deunydd rhyddiaith amrywiol, peth ohono wedi'i gyhoeddi yn Y Drysorfa ac yn Y Rhedegydd, 1879-1954; llawysgrifau cerddorol, 1876-[c. 1934]; beirniadaethau eisteddfodol, 1870-1939; llyfrau lloffion yn cynnwys torion o'r wasg, [c. 1879]-1940; dyddiaduron, 1864-1935; cofnodion chwareli llechi Blaenau Ffestiniog, 1868-1951; amryw gyfrifon a llyfrau cyfrifon yn ymwneud â gwahanol fusnesau a sefydliadau, 1784-1932; cofnodion yn ymwneud ag eglwysi'r Methodistiaid Calfinaidd, 1840-1951, gan gynnwys rhai Bethel, Tanygrisiau, [1840x1945]; pregethau a nodiadau crefyddol,1846-1952; deunydd printiedig yn cynnwys effemera etholiadol, marwnadau, baledi, carolau ac emynau, 1820-1948; a gweithredoedd a dogfennau yn ymwneud â siroedd Caernarfon, Meirionnydd a Dinbych, 1759-1947. = Correspondence, poetry, prose and family papers, relating to J. W. Jones, 1878-1954, and to his father, 'Glan Barlwyd', 1866-1917; material collected by J. W. Jones relating to individuals and organizations in the Blaenau Ffestiniog area, including correspondence, poetry and other papers of 'Gwilym Deudraeth', 1917-1939, 'Elfyn', 1874-1917, Rev. R. R. Morris, 1883-1933, 'Alafon', 1875-1915, 'Llifon', 1899-1916, 'Isallt', 1887-1913, and 'Glyn Myfyr', 1893-1937; letters to John Daniel Davies as editor of Y Rhedegydd, 1930-1942; poetry and other papers of T. Gwynn Jones, 1910-1944; poetry, [1840]-1940, by various poets, including Hedd Wyn and R. Williams Parry; various prose material, some of which was published in Y Drysorfa and Y Rhedegydd, 1879-1954; musical manuscripts, 1876-[c. 1934]; eisteddfod adjudications, 1870-1939; scrapbooks containing press cuttings, [c. 1879]-1940; diaries, 1864-1935; records of Blaenau Ffestiniog slate quarries, 1868-1951; various accounts and account books relating to various trades and organisations, 1784-1932; records relating to Calvinistic Methodist churches, 1840-1951, including those of Bethel, Tanygrisiau, [1840x1945]; sermons and religious notes, 1846-1952; printed material including electoral ephemera, elegies, ballads, carols and hymns, 1820-1948; and deeds and documents relating to Caernarfonshire, Merionethshire and Denbighshire, 1759-1947.

Records and papers, 1647-1872, relating to the manors of Llanelidan, Llanfair Dyffryn Clwyd, Rhos, Llanhychan, Rhiwbebyll, Llech, Llan and Meifod, Denbighshire, 1647-1872; miscellaneous documents including papers relating to Llanelidan enclosures, 1797-1832; miscellaneous papers relating to the Bishop of Bangor's estate in Llanelidan, 1828-1836; and posters issued by the Ruthin Association for the Prosecution of Felons, 1846-1851.

Papers relating to families and estates in north Wales, including the West family, the Chirk Castle estate, the Hengwrt, Rug and Nannau estate, the Wynnstay estate, the Penbedw estate, the estate of Richard Willding of Llanrhaeadr Hall, Denbighshire, and the Whitehall-Davies family of Broughton Hall, Flintshire, and Llannerch, Denbighshire. Records and correspondence, including relating to abstracts of title, chapels, churches, conveyances, inclosures, industrial activity, law suits, mining, parliamentary elections, probate, railways, schools and tithe commutation. Office records, including cash journals, bill books and letter books, [19th century]-[20th century].

A collection comprising manuscripts of Denbighshire interest, including overseers' accounts, 1823-1836, poor rate assessments, 1843, and highway assessments, 1853-1862; a Llanefydd vestry book, 1788-1868; an account book of Llansilin Friendly Society, 1811-1832; accounts, etc., relating to Bethania Calvinistic Methodist church Llanbedr Dyffryn Clwyd, 1857-1912, to the Tabernacle Calvinistic Methodist church, Rhuthun, 1890-1919, and to the Rhuthun District Calvinistic Methodist Sunday School, 1867-1883; and transcripts of material relating to tithes and highway rate assessments in Llanbedr Dyffryn Clwyd.

'Notes on Places and Objects in Flintshire and Denbighshire' [and Caernarvonshire], including the parishes and churches of Bodelwyddan, Bodfari, Caerwys, Cilcain, Cwm, Dyserth, Flint, Gwaunysgor, Halkin, Hawarden, Broughton (St Mary's Church), Hawarden (St John the Baptist, Pentrobin), Holywell, Hope, Llanasa, Llanfynydd, Meliden, Mold, Nannerch, Nerquis, Newmarket, Northop, Rhuddlan, Rhyl, St Asaph (parish church and cathedral), Tremeirchion, Treuddyn, Whitford, Ysceifiog, Bangor-is-y-coed, Bettisfield, Hanmer, Is-y-coed, Marchwiel, Overton, Worthenbury, Abenbury Fawr, Allington, Abergele, Bersham, Bettws yn Rhos, Brymbo, Bryneglwys, Bylchau, Burton, Cefn (St Asaph), Cerrig-y-drudion, Chirk, Clocaenog, Denbigh, Derwen, Efenechtyd, Eglwysfach, Erbistock, Esclusham, Gresford, Gwytherin, Henllan, Holt, Llanarmon yn Iâl, Llanarmon Mynydd Mawr, Llanbedr Dyffryn Clwyd, Llanddoget, Llandegla, Llandrillo yn Rhos, Llandyrnog, Llanelian yn Rhos, Llanfair Dyffryn Clwyd, Llanelidan, Llanfair Talhaiarn, Llanferres, Llanfihangel Glyn Myfyr, Llanfwrog, Llangadwaladr, Llangedwyn, Llangernyw, Llangollen, Llangwm, Llangwyfan, Llangynhafal, Llannefydd, Llanrhaiadr yn Cinmerch, Llanrhaiadr ym Mochnant, Llanrhudd, Llanrwst and Capel Garmon, Llansannan, Llansantffraid Glyn Ceiriog, Llansantffraid Glan Conwy, Llansilin, Llantysilio yn Iâl, Llanychan, Llanynys, Marchwiel, Minera, Nantglyn, Pentrefoelas, Ruabon, Ruthin, St George's, Stansty, Trebrys, Trefnant, Wrexham, Ysbyty Ifan, Conway, Llangystennin, Llanrhos (Llandudno) and Llysfaen. Many illustrations of churches, houses, etc. have been included and there are additional notes by Susan Mainwaring (of Henblas, St Asaph).

Notes relating mainly to Denbighshire churches and parishes.

Miscellaneous collectanea, including notes on Denbighshire and Flintshire churches, parishes, etc.

Legal precedents and transcripts of official letters and orders, largely of Denbighshire and Flintshire interest; a calendar; proportions of mise payable by the different townships of Isdulas, Denbighshire; etc.

Papers connected mainly with the activities of David Pennant of Downing, Flintshire, son of Thomas Pennant. They include material relating to affairs in Flintshire and north-east Wales in general and the Holywell district in particular and consist of letters from Henry Chambers, Edward Jones (David Pennants secretary or agent), F. R. Price (Bryn-y-pys), C. Oldfield (Perthyterfyn), Henry Parry (vicar of Llanasa), J. Oldfield, David Edisbury, D. Scott, etc.; drafts and memoranda by David Pennant; papers relating to The Charity for the Relief of the Poor Widows and Orphans of Clergymen who officiated in the diocese of St. Asaph, Flintshire and Denbighshire parliamentary elections and political affairs, parliamentary reform, poor-law relief, soup kitchens, canals, collieries and colliery strikes, public celebrations, the Holywell Loyal Volunteers, church schools, clothing clubs, eisteddfodau, auction sales, the Flintshire Dispensary, the Holywell Annual Vestry, the Holywell Hunt, etc.; a Latin poem; etc.