Professional papers of Ywain Goronwy ap Griffith comprising agreements, specifications, plans and correspondence, 1927-53, mainly relating to the alteration, repair and erection of new buildings, both private and public, in Merionethshire, Montgomeryshire and Caernarfonshire; files relating to work done in the diocese of Bangor, mainly in the form of alterations and repairs to vicarages, 1932-1952; and papers, 1920-40, relating to the redemption of tithe rent-charges in various parishes of Anglesey, Caernarfonshire, Cardiganshire and Merionethshire.

Deeds and documents relating to properties mainly in Montgomeryshire, 1615-1910.

Deeds and documents relating to Cardiganshire, 1590-1751; and Montgomeryshire, 1517-1770; deeds and documents relating to the Hughes family of Gogarth, 1669-1910; and miscellaneous items, 1692-1825.

Deeds and documents of the Bennett family of Glanyrafon, Montgomeryshire, and the Owen family of Dolgoed and Llawrpenegoes, 1546-1946, relating mainly to properties in the parishes of Llanidloes, Llanwrin, Penegoes, and Trefeglwys, Montgomeryshire, and Talyllyn, Merionethshire; and a map of properties in Trefeglwys, 1819.

Records, 1841-1897, of Trefeglwys School Board, 1871-1897; Llangurig School Board, 1874-1898; Poor Law Records of Newtown and Llanidloes Poor Law Union for the parish of Trefeglwys, Montgomeryshire, including: rate books, 1845-1892; Overseer's receipt and payment books, 1849-1872; and Collector's unpaid rates statement books, 1853-1883; and miscellaneous papers, 1879-1897.

Copi o draethawd a gyflwynwyd ar gyfer gradd MA gan Lona Jones (née Gwilym) yn dwyn y teitl 'Traddodiad barddol Maldwyn yn y ddeunawfed ganrif', Prifysgol Cymru Aberystwyth, 1983.

Papers of Tom Owen, HMI, of Aberystwyth, Cardiganshire, 1898-1966, mainly relating to his career in education, including inspector's reports on schools in Montgomeryshire, 1946-1950; reports on St. David's College, Lampeter, Cardiganshire, 1907-1945; and personal papers, 1898-1966.

Deeds, documents and plans, 1455-1895, relating to properties in Anglesey, Caernarfonshire, Denbighshire, Merionethshire and Montgomeryshire; including papers of the Poole family, owners of the Caenest and Pencraig estates in Merionethshire and Anglesey; surveys, [c. 1770] of the Caenest and Pencraig estates; and building leases for properties in the port of Amlwch, [late 18th century].

Transcripts of the titles of Welsh ballads contained in a manuscript at one time [1925] in the possession of Hugh Davies, Lluest, Llangadfan, Montgomeryshire, together with transcripts by Hugh Davies of the titles of books of local Montgomeryshire interest, with notes by the transcriber on the authors and subjects of the ballads and books.

Mr Gwynne kindly allowed the Library to produce print-outs of his database, comprising an index to Montgomeryshire marriages extracted from parish registers and bishop's transcripts, dating from the sixteenth century onwards.

Survey, [1600x1675], relating to Ryston, Mountgom[er]y, Wititree, Tunebert, Stocton, Woderton, Marinton, the church of Churburye, and a warren in the manor of Worthin.

Deeds and documents, 1555-1875, relating to properties in the counties of Pembrokeshire, Anglesey, Montgomeryshire; deeds, 1696-1868, of lands in the parishes of Llanfair Dyffryn Clwyd, Llanelidan, Efenechtyd, and Llanfwrog, Denbighshire; and documents, 1735-1868, relating to the Eyarth Estate, Denbighshire.

Manuscripts, 1707-[1937], from the library of Richard Bennett of Llanbrynmair and Caersws, Montgomeryshire, much of which is in the hand of Richard Bennett himself. The collection comprises material largely of Montgomeryshire interest and includes parochial records, transcripts from parish registers, extracts from probate records (some of Merionethshire interest) and genealogical records, and extracts from printed works relating to Montgomeryshire.

Deeds and documents (1668-1882) relating to properties mainly in in co. Flint (Axton, Bistre, Caergwrle, Coleshill, Cwm, Cwm Uwchglan, Diserth, Estyn or Hope, Hawarden, Holywell, Hope, Hope Owen, Huriathicke, Kilken, Kinnerton, Mould, Newmarket, Northop, St Asaph, Shordley, Skeiviog, and Whitford), but also in cos Denbigh (Denbigh, Henllan, Llanrwst and Lleweny), Chester (Chester and Dodleston), Brecknock (Devynnock), Anglesey (Amlwch, Coedana, Llanerchymedd, Llanbadrug, Llanddyfnan, Llanfechell and Llanfihangel Tre'r Beurdd), Montgomery (Berth Lloyd) and Pembroke (Amroth). The main families were Mostyn of Mostyn Hall and Hope of Broughton and Hope.

Genealogical and other notes from various sources, including certified copies of entries in parish registers, etc., mainly relating to persons and places in Montgomeryshire.

Minute books, 1895-1971, of the Llandysilio Liberal Association, 1895-1909 and Montgomeryshire Liberal Association, 1920-1970; financial records; 1934-1989; administrative correspondence and papers, 1961-1984; files relating to the Liberal campaign in Montgomeryshire in the parliamentary elections, 1955-1983; constituency papers of Clement Davies, 1945-1962, and Emlyn Hooson, 1967-1979; press cuttings, 1962-1987; bound electoral registers for the parliamentary constituency of Montgomery, 1953-1983; papers relating to the Welsh Liberal Party, 1973-1979, the Montgomery in Europe Group, 1975, Young Liberals, 1970-1980, Liberal Party organization, 1977-1983, Supper Clubs, 1980-1983, Montgomeryshire Liberal Association Annual General Meetings, 1980-1985, Liberal Party Annual Conferences, 1980-1985, and the Welsh Campaign for Fair Votes, 1983-1984; printed materials, 1959-1987; Liberal party materials, 1963-1985; typescript draft policy statements, 1972-1974; Newsletters of the Montgomeryshire Liberal Association, 1978-1984; Association of Liberal Councillors, 1979-1984, and Focus, 1980-1982.

An additional group of records, 1904-1939, were received per Dr David Steeds comprising extensive files of correspondence, the minutes of the Association and its various committees and sub-committees, financial material, press cuttings and printed material. There are also many files deriving from the parliamentary general elections campaigns of the period 1906-29 in Montgomeryshire. There are also papers relating to the North Wales Liberal Federation, 1940-46, and the Liberal Federation of Wales, 1943-45. The records cover the period when David Davies, Llandinam (1880-1944) was the Liberal MP for Montgomeryshire, 1906-29, and the early years of its representation by his successor E. Clement Davies (1884-1962). This group remains uncatalogued.

A volume, 1906, containing lists of communicants in the Diocese of Bangor, relating specifically to Montgomeryshire and Merionethshire.

Treatises in Latin; a Greek vocabulary; material relating to the hundreds and parishes of Merioneth, Montgomeryshire and Pembrokeshire; 'the Syren & the hundredes of Engelonde'; rentals of several North Wales manors; an account of a tax paid by North Wales counties in 1701; a transcript of documents of King Alfred; etc.

Papers of Mary Garbett Edwards, including scrapbooks containing family photographs and letters, [1890]-1973; Montgomeryshire Liberal Party, General Purposes Committee, minute book, 1950-1959; letters, 1929-1983; journals of visits to North America, 1936-1949; notebooks and notes for speeches, [20th century]; radio scripts and related material, 1943-1963; papers relating to Garbett Edwards, including eisteddfod essays and other papers, 1897-[1930s], journal of Canadian visits, 1936-1939, and publications and annual reports of the Mid Wales Industrial Development Association, 1957-1973.

Records, correspondence and notes, 1819-1983, relating to the history of Manafon school.