Papurau Robert Roberts,1934-1954, gan gynnwys llythyrau, nodiadau, llyfrau lloffion a defnyddiau pellach yn ymwneud â'i waith ar hanes a llenyddiaeth Gogledd Cymru, ac ar Absalom Fardd. = Papers of Robert Roberts, 1934-1954, comprising letters, notes, scrapbooks and other material relating to his work on the history and literature of North Wales, and to Absalom Fardd.

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.

Notes of Flintshire interest, comprising extracts from public records and from Harleian manuscripts (e.g. arms from MS 1143), and lists of original sources to be examined.

Letters, 1763-1837, most of them addressed to David Pennant, and mainly dealing with local affairs (Board of Guardians, Flint Enclosure Bill, etc.).

Addresses, 1919, by Meredith J. Hughes on Flintshire worthies ('Rhai o enwogion Sir Fflint') and on 'The alleged voyages of Madoc son of Owen Gwynedd, Prince of North Wales, in the XIIth cent.'.

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

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.

Manuscripts comprising drafts of the hitherto-unpublished portions of Edward Owen's Catalogue of manuscripts relating to Wales in the British Museum, with draft indexes; reports prepared by Edward Owen on Liverpool Town Dues and related papers, 1931; essays written by him for the London Eisteddfod, 1887, and the National Eisteddfod at Caernarfon, 1894; notes, pedigrees, transcripts and letters relating to Welsh history, antiquities, county history, families and individuals such as John Edwards of Chirk, and historical figures including Owain Glyndwr [some items published 1893-1935]; transcripts and extracts relating to the history of Wales taken from public records by Edward Owen, E.A. Lewis and others, including several land surveys, at least one of which was used as evidence before the Royal Commission on Land in Wales, 1895; transcripts of papers by or relating to Alfred Neobard Palmer, Wrexham, 1885-1922; facsimiles and original documents including Privy Purse Accounts of Queen Anne, 1702-1710, and a holograph letter from Queen Anne to Sarah, duchess of Marlborough, 1710; letters mainly addressed to William Edwards of Chirk Hall, 1675-1677; autograph letters, mostly addressed to Edward Owen, 1886-1943; and deeds, 1463-1769, the majority of which relate to the estates of the families of Edwards of Plas Newydd and Puleston of Emrall in cos. Denbigh and Flint.

Correspondence and genealogical notes and papers relating to the Pierce family of Meiriadog, Denbighshire, later of Cwybyr, Flintshire, 1841-1936; leases and a few other documents, 1596-1764; autograph letters of David Jones, Llangan, 1800, and Rice Owen Jones, Blaenau, 1815; correspondence and financial accounts relating to barques and ships, 1873-1885; and letters, 1934-1936, relating to a stained glass memorial window for Llandrillo Parish Church, Denbighshire.

A manuscript containing eight diaries and account books relating to Flintshire and Denbighshire, including some kept by Thomas Ffoulkes, Mertyn, Holywell, containing entries for various years between 1693 and 1750, and two containing household and farming memoranda and recipes, 1752-1788.

A manuscript containing miscellanea by Richard Llwyd (1752-1835), with a few notes by Angharad Llwyd (1780-1866); Notes on the Registers and Churchwardens' Accounts of St. Michael's, Chester, by J. P. Earwaker, 1890; a letter from W. W. E. Wynne (1801-1880) to Angharad Llwyd; particulars of the sale of the manor of Kinmel, 1784; genealogical tables and papers relating to the family of Jones, Penrallt, Abergele; calendar notes of deeds relating to Denbighshire and Flintshire (many of the original deeds being now in NLW); etc.

A manuscript containing miscellaneous notes, memoranda, transcripts and press cuttings relating mainly to Flintshire and Denbighshire; extracts from Mold churchwardens' account books; numerous letters to H. R. Hughes (1827-1911); transcripts of Civil War and Commonwealth period papers relating to North Wales; a copy of W. D. Pink: Notes on the Middleton Family of Denbighshire ... (Chester, 1891); etc.

Copies and abstracts of documents in the Public Record Office, the British Museum, etc. relating to Flintshire.

Copies of records in the British Museum, the Public Record Office, etc. relating to Flintshire and Cheshire.

Papers, 1743-1994, of or relating to Margaret Mostyn Jones of Wern House, Mostyn, Flintshire, and to members of her family, and including a journal, 1861-1864, kept by her while employed by Augusta Hall, Lady Llanover; correspondence, 1876-1932, to and from Margaret Mostyn Jones, including letters, 1890-1894, written to members of her family while living in Ohio; an autobiographical essay, 1929-1932, by Margaret Mostyn Jones; together with papers, 1743-1874, mainly of Flintshire interest.

Printed lists of the St Asaph parish records held by the Flintshire Record Office, comprising Bettisfield, Bodelwyddan, Bronington, Brynford, Gorsedd, Nercwys, Overton, Treuddyn and Ysceifiog.

An address on 'Chester in its relation to Flintshire'; and a few notes from printed sources on the Justices of Chester.

Transcripts relating to Flintshire from William Camden (trans. Edmund Gibson): Britannia, 1772, Vol. II; together with an incomplete table (abbas-calumpniatorum) of Latin abbreviations.

Letters addressed to Huw T. Edwards, 1929-1970, and carbon copies of letters sent by him, 1945-1969, concerning politics, literature, and the Council for Wales and Monmouthshire, including letters to and from political figures in the Labour Party and Plaid Cymru, and Welsh literary figures; pocket diaries, 1929-1968; minute books of the North Wales Labour Federation, 1923-1930; reports and memoranda concerning the activities of the Council for Wales and Monmouthshire, political life in North Wales, and the activities of TWW, 1935-1966; press cuttings relating to Edwards' political career and the activities of the Council for Wales and Monmouthshire, 1930-1968; illuminated addresses and distinctions presented to him, 1933-1969; miscellaneous printed items, 1912-1967; poems by him, 1950-1958; and other personal papers, 1926-1967; and acquired papers, notably letters from Sir Owen M. Edwards to Hughes and Son, Wrexham, printers, 1894-1895.

Deeds purchased from W. A. Evans, relating to Denbighshire, Flintshire and Anglesey, 1310-1795.