An agreement, 23 February, 1846, for the lease by Griffith Howell Vaughan, esq., of Rug, Merioneth, to Griffith Owen, of Vaner, parish of Llanelltyd; an indenture, 1 May, 1848, of apprenticeship for five years of Joseph Roberts of Rose Street, Ruthin, as master in Ruthin British School (Edward Jones of Brynhyfryd, esq., James Maurice of Well Street, esq., and John Jones of Market Place, Ruthin, managers, and John Edmunds of Ruthin, master) (a printed appendix contains extracts from minutes of the Committee of Council on Education, 21 December, 1846, and endorsed is an assignment of the original indenture to James Cromwell, successor to John Edmunds, 27 November, 1850); an unexecuted agreement for the lease from Hugh John Ellis Nanney of Gwynfryn, parish of Llanstymddwy, Caernarvonshire, esq., to David Evans of Cae Einion, Dolgelley, Merioneth, from year to year, commencing 25 March, 1887, of the farm called Cae Einion; a declaration signed by thirty-two students of Trevecca College, 11 November, 1889, denying statements made in Yr Haul 'concerning the intended secession of any student to the Church of England'; a galley proof of an article entitled 'Mr. Lloyd George, M.P., and the Goleuad', relating to Disestablishment and the bearing of Mr. Lloyd George's political action on Welsh Liberal policy, together with manuscript observations by Sir E. J. Reed, M.P. for Cardiff; a pedigree of the family of Jones of Llanio, Cardiganshire; miscelaneous poetry of Dolgelley interest (e.g. verses on the occasion of the marriage of Joseph Roberts, C.M., British School, and Miss Annie Jones, Penbryn, Dolgellau, 1860); a receipt for poor rate for the parish of Dolgelley, 1846; press cuttings, 1888, relating to the case of H. J. Ellis Nanney and his Merioneth tenants; Morris Charles Jones: Valle Crucis Abbey ... (London, 1866), bearing the name of R[ichard] Williams [Celynog, Newtown], 20 October, 1866; and 'Etholiad Cyffredinol 1900. Miss Meirion: Hanes ei Charwriaeth, ei Gwaeledd, ei Thranc, a'i Chynhebrwng. Gan Tudur Llwyd' (3rd edition).

Papers, 1644-1691, accumulated by members of the Herbert family of Cherbury during the course of their political activities. They include records and correspondence, 1644-1658, relating to the family’s role in the civil war throughout Wales, and their subsequent dispossession and rehabilitation; records and correspondence, 1660-1689, concerning the Montgomeryshire militia and the suppression of disaffected persons in the Welsh marches; and records and correspondence, 1660-1691, relating to the family’s support of Charles II and James II, including military service in France.

Constituency correspondence and papers of Ron Davies, 1979-1997, comprising general correspondence on constituency and national affairs, 1983-1997; general constituency papers, 1983-1995; constituents' papers, 1984-1997; subject files from his constituency office and his London office, 1984-1998, including agriculture, the National Health Service and the Welsh language; and papers relating to various pressure groups, 1979-1983.

An interleaved copy of W. R. Williams, The Parliamentary History of the Principality of Wales..., 1541-1895 (Brecknock, 1895) with copious manuscript additions and corrections in the hand of the author, [c. 1912], in preparation for a projected second edition.
Deletions and minor corrections were generally made directly to the original text with more substantial changes supplied on the interleaves opposite. Among the main additions are details of elections, 1895-1910. There are a few further additions to the List of Subscribers (pp. 213-218) up to about 1919. Three items found in the volume have been loosely inserted opposite pp. 77 and 78.

Papurau Undeb Cymru Fydd, yn cynnwys cofnodion, 1939-1966, gohebiaeth, 1944-1955, a chofnodion eraill y Cyngor, 1945-1963; papurau'n ymwneud â Phwyllgor Amddiffyn Diwylliant Cymru a ffurfio Undeb Cymru Fydd, 1939-1942; cofnodion a phapurau'r Pwyllgor Gwaith, 1943-1969; cofnodion ariannol, 1939-1970, yn cynnwys papurau'r Pwyllgor Ariannol, 1957-1966; cofnodion yn ymwneud â Phwyllgor Cronfeydd Deddf yr Eglwys yng Nghymru, 1953-1970; papurau'n ymwneud â'r Pwyllgor Llyfrau a chyhoeddiadau gan gynnwys Yr Athro a' calendr, 1944-1970; papurau Pwyllgor y Merched a Llythyr Ceridwen, 1955-1969; cofnodion amrywiol ganghenau, 1940-1956; papurau'n ymwneud â'r cynadleddau blynyddol, 1939-1964; papurau a gohebiaeth gyffredinol o'r brif swyddfa, 1941-1970; papurau, 1942-1948, a chofnodion, 1943-1947, Cyd Bwyllgor Undeb Cymru Fydd a'r Eglwysi; torion o'r wasg, 1939-1952; atebion i holiadur 'Ymchwil Undeb Cymru Fydd i Gyflwr Bywyd Cymdeithasol Cymru', 1943; papurau'n ymwneud ag ymgyrch Senedd i Gymru, 1950-1957; papurau'n ymwneud â materion ynglŷn â'r cyfryngau ac ymgyrchoedd, 1945-1963; papurau ynglŷn â'r iaith Gymraeg, yn enwedig mewn perthynas ag addysg, 1947-1964; papurau'r Pwyllgor Addysg, 1944-1963; papurau'n ymwneud ag Eisteddfodau Cenedlaethol, 1947-1968; papurau'n ymwneud â meddiannu tir gan y llywodraeth (Mynydd Epynt, Tryweryn, a thiroedd eraill) ac ynghylch dŵr, 1940-1958; copïau o Cofion Cymru, 1941-1946; copi llawysgrif y gyfrol Undeb Cymru Fydd 1939-1960 (1960) gan T. I. Ellis; a llythyrau at Ymddiriedolaeth Undeb Cymru Fydd. = Papers of Undeb Cymru Fydd, including minutes, 1939-1966, correspondence, 1944-1955, and other records, 1945-1963, of the Council; papers relating to Pwyllgor Amddiffyn Diwylliant Cymru and the formation of Undeb Cymru Fydd, 1939-1942; minutes and papers of the Executive Committee, 1943-1969; financial records, 1939-1970, including papers of the Financial Committee, 1957-1966; records relating to the Welsh Church Act Funds Committee, 1953-1970; papers relating to the Books Committee and publications including Yr Athro and the calendar, 1944-1970; papers of the Women's Committee and Llythyr Ceridwen, 1955-1969; records of various branches, 1940-1956; papers relating to the annual conferences, 1939-1964; general papers and correspondence from the main office, 1941-1970; papers, 1942-1948, and minutes, 1943-1947, of the Joint Committee of Undeb Cymru Fydd and the Churches; press cuttings, 1939-1952; replies to the questionnaire 'Ymchwil Undeb Cymru Fydd i Gyflwr Bywyd Cymdeithasol Cymru' (Survey of the condition of social life in Wales), 1943; papers relating to the Parliament for Wales campaign, 1950-1957; papers relating to media issues and campaigns, 1945-1963; papers concerning the Welsh language, particularly in relation to education, 1947-1964; papers of the Education Committee, 1944-1963; papers relating to the National Eisteddfodau, 1947-1968; papers relating to government requisition of land (Mynydd Epynt, Tryweryn, and other land) and water issues, 1940-1958; copies of Cofion Cymru, 1941-1946; manuscript of the volume Undeb Cymru Fydd 1939-1960 (1960) by T. I. Ellis; and letters to the Undeb Cymru Fydd Trust, 1967-1991.