Papers of Sir Idris Foster comprising correspondence; personal papers, 1953-1978; papers, 1963-1978, relating to the Standing Commission on Museums and Galleries; radio and television scripts, [1949x1984]; notes and correspondence relating to his work on `Culhwch ac Olwen', including copies of his MA thesis, 1935-1961; scholarly and academic notes; papers relating to the National Eisteddfod, 1960-1985; material on Ireland and the Irish language, 1958-1982; copies of university dissertations, 1924-[1980]; drafts and typescript versions of articles, lectures and broadcasts received by Foster, 1949-1983; and index slips of Old and Middle Irish and Middle Welsh words; papers relating to the Honourable Society of Cymmrodorion, 1947-1978, the University of Wales, 1936-1984, including the Board of Celtic Studies,1955-1975; Jesus College and Oxford University, 1960-1984, the Church in Wales, 1957-1983, archaeological bodies, the Ancient Monuments Board for England and Ancient Monuments Board for Wales, 1960-1985, the National Eisteddfod, 1960-1985, Cyngor yr Iaith Gymraeg, 1973-1977, and other councils, committees and societies, 1951-1984.

Three copybooks of lecture notes, 1902-1904, compiled by John Tudor of Hebron, Pembrokeshire, whilst an undergraduate at the University College of North Wales, Bangor.
The volumes include notes on Welsh poetry (1450-1600) and exercises in Hebrew grammar (NLW MS 16192iB); notes on Welsh poetry (1300-1450), notes on Welsh and Irish philology and a comparative list of Irish and Welsh words (NLW MS 16192iiB); and notes on Welsh poets of the fifteenth century (NLW MS 16192iiiB). A note from the donor is included (with NLW MS 16192iB)

Manuscripts, [late 12 cent.]-[early 20 cent.], formerly part of the library of the Mostyn family of Mostyn Hall, Flintshire, comprising transcripts and extracts from Giraldus Cambrensis, Geoffrey of Monmouth, Dares Phrygius, Nennius, Gildas, David Jenkins (Judge Jenkins), Sir John Wynn of Gwydir, Lydgate's 'Life of Our Lady', Leland's Itinerary, 'Chroniques de France', historical manuscripts such as Brut y Tywysiogion and Brut y Brenhinoedd, Welsh romances and the Mabinogion; collections of mainly Welsh poetry, among them the seventeenth-century volumes Llyfr Coch Nannau and Llyfr Gwyn Corsygedol, containing poems by Dafydd ap Gwilym, Guto'r Glyn, Tudur Aled, Siôn Cent and others; genealogies, pedigrees and histories; official papers relating to Caernarvonshire; catalogues of the Mostyn and Gloddaeth libraries, 1692-1842; etc.

A scrap book compiled by John Jones ('Myrddin Fardd') containing manuscript notes and press cuttings on Welsh orthography, the significance of the poetry of mediaeval Welsh bards, etc. ('Orgraff', 'Geiriau', 'Yr Iaith yn Newid', 'Gweithiau y Beirdd', 'Canu Clod eu Noddwyr', etc.).

Letter, 13 October 1982, from Saunders Lewis, Penarth, to Kathryn A. Klar, Richmond, California, replying to a letter concerning her research into Canu Aneirin at the University of California, Berkeley.
He describes the negative reaction of Ifor Williams, amongst others, to his book Braslun o Hanes Llenyddiaeth Gymraeg (Cardiff, 1932), the conclusions of which however correspond with those of Klar and her colleagues; he also describes his current state of health.

Papurau W. J. Gruffydd,[1903]-[1952], yn cynnwys drafftiau o erthyglau'n ymwneud â'r Mabinogi; nodiadau darlith ar gyfer ei gyrsiau Cymraeg yng Ngholeg Prifysgol Cymru, Caerdydd; nodiadau darlithoedd ac erthyglau eraill; sgyrsiau a darlledwyd gan y BBC; personalia; a grŵp sylweddol o ohebiaeth oddi wrth ffigurau llenyddol blaenllaw = Papers of W. J. Gruffydd, [1903]-[1952], including drafts of articles relating to the Mabinogi; lecture notes for his Welsh courses at University College of Wales, Cardiff; other lecture notes and articles; BBC broadcast talks; personalia; and a substantial group of correspondence from notable literary figures.

Llawysgrif, [17 gan., canol], yn ôl pob tebyg yn llaw William Maurice, Llansilin, yn cynnwys barddoniaeth gaeth Gymraeg, cywyddau gan mwyaf, o waith o leiaf chwech ar hugain o feirdd. = A manuscript, [mid-17 cent.], probably in the hand of William Maurice, Llansilin, containing Welsh strict-metre poetry, mostly cywyddau, by at least twenty-six poets.
Priodolir y cerddi i'r beirdd canlynol: Tho[mas] Prys (ff. 1, 8-9), Y Meister Sion Tudur (f. 1 recto-verso), Sr. Gruffydd Owen (ff. 1 verso-2 verso, 5 verso-6 verso, 10 recto-verso, 24 verso-25), y Bedo Brwynllys (ff. 2 verso-3), Bedo Aryrddrem (ff. 3, 21 verso, 26), Huw Arwystli (ff. 3 recto-verso, 26-27), Rys Cain (f. 4 recto-verso), Morys Dwyfech (ff. 5 recto-verso, 25-26), Sion Phylip (ff. 6 verso-7), Sr Dafydd Owain (ff. 7 verso-8), W[illia]m llŷn (ff. 9 recto-verso, 12 verso-13), Sr Phylip Emlyn (ff. 10 verso-11), Ifan Dyfi (ff. 11-12), Dafydd ap Gwilim (ff. 12 recto-verso, 16, 17 verso-18, 20-21, 27 recto-verso, 28-29 verso, 30 verso), Sion Cain (ff. 13 verso-14), y Meistr Hughe Machno (ff. 14-15), Einion ab Gwalchmai (f. 15 verso), Sion Mowddwy (f. 16 verso), Tudur Aled (f. 17 recto-verso), Dafydd ap Edmwnt (ff. 18 verso-19), Dafydd Nanmor (f. 19 recto-verso), Gwillim tew brydydd (ff. 19 verso-20), Lewis Môn (f. 21), William Cynwal (ff. 21 verso-23, 24), 'Mr Roberts or tu hwnt ir môr' [Dr Gruffydd Robert, Milan] (ff. 23 verso-24) a Simwnt Vychan (ff. 27 verso-28, 30). Mae ambell i gerdd yn ddienw (ff. 4 verso-5, 7 recto-verso, 16, 18 recto-verso, 22 recto-verso). Mae yna nodiadau o ramadeg barddol, yn trafod yr englyn unodl union a'r englyn unodl cyrch, ar f. 30. Ceir nodiadau yma ac acw, mewn llaw o'r ddeunawfed ganrif, yn awgrymu dyddiadau blodeuo'r beirdd (e.e. f. 3: '1500 medd Thomas Richards'); daw y rhain o restr yn Thomas Richards, Antiquae Linguae Britannicae Thesaurus... (Bryste, 1753). = The poems are attributed to the following: Tho[mas] Prys (ff. 1, 8-9), Y Meister Sion Tudur (f. 1 recto-verso), Sr. Gruffydd Owen (ff. 1 verso-2 verso, 5 verso-6 verso, 10 recto-verso, 24 verso-25), y Bedo Brwynllys (ff. 2 verso-3), Bedo Aryrddrem (ff. 3, 21 verso, 26), Huw Arwystli (ff. 3 recto-verso, 26-27), Rys Cain (f. 4 recto-verso), Morys Dwyfech (ff. 5 recto-verso, 25-26), Sion Phylip (ff. 6 verso-7), Sr Dafydd Owain (ff. 7 verso-8), W[illia]m llŷn (ff. 9 recto-verso, 12 verso-13), Sr Phylip Emlyn (ff. 10 verso-11), Ifan Dyfi (ff. 11-12), Dafydd ap Gwilim (ff. 12 recto-verso, 16, 17 verso-18, 20-21, 27 recto-verso, 28-29 verso, 30 verso), Sion Cain (ff. 13 verso-14), y Meistr Hughe Machno (ff. 14-15), Einion ab Gwalchmai (f. 15 verso), Sion Mowddwy (f. 16 verso), Tudur Aled (f. 17 recto-verso), Dafydd ap Edmwnt (ff. 18 verso-19), Dafydd Nanmor (f. 19 recto-verso), Gwillim tew brydydd (ff. 19 verso-20), Lewis Môn (f. 21), William Cynwal (ff. 21 verso-23, 24), 'Mr Roberts or tu hwnt ir môr' [Dr Gruffydd Robert, Milan] (ff. 23 verso-24) and Simwnt Vychan (ff. 27 verso-28, 30). A few further poems are anonymous (ff. 4 verso-5, 7 recto-verso, 16, 18 recto-verso, 22 recto-verso). There are notes from a bardic grammar, discussing the 'englyn unodl union' and the 'englyn unodl cyrch', on f. 30. Notes added here and there, in an eighteenth-century hand, give suggested floruit dates for the poets (e.g. f. 3: '1500 medd Thomas Richards'); these are taken from a list in Thomas Richards, Antiquae Linguae Britannicae Thesaurus... (Bristol, 1753).

Copi ffotostat o 'Harvard MS Welsh 8,' sef cyfrol yn perthyn i gasgliad llawysgrifau William Bodwrda yn cynnwys barddoniaeth Gymraeg gan feirdd o'r 14 gan. hyd at 17 gan., a gopïwyd [1640x1660]. = A photostat facsimile of 'Harvard MS Welsh 8' which is a volume from the collection of manuscripts of William Bodwrda containing Welsh poetry from 14 cent to 17 cent, copied [1640x1660]
Ceir awdlau, cywyddau a darnau o hen ganu brud yn y llawysgrif, nifer ohonynt yn canu i deuluoedd sir Gaernarfon; cerddi a briodolir i Daliesin a Llywarch Hen; a nifer o eitemau sy'n unig gopïau, sef gwaith Huw Pennant (tt. 13-17), Ifan Tew Brydydd (tt. 53-5), Howel ab Reinallt (tt. 65-7), Siôn Phylip (tt. 90-4), Syr Huw Roberts Llên (tt. 94-7), a Siôn Tudur (tt. 127-31). Mae'n debyg nad llaw William Bodwrda mo'r un o'r ddwy brif law yn y gyfrol, ond credir fod y llawysgrif yn gynsail i un neu fwy o lawysgrifau ffolio William Bodwrda, megis BL Add. 14966 a Mostyn 145 (NLW MS 3048D). = The manuscript comprises 'awdlau', 'cywyddau' and old vaticinatory poetry, many relating to Caernarfonshire families; poems attributed to Taliesin and Llywarch Hen; and a number of items which are unique copies, namely the works of Huw Pennant (pp. 13-17), Ifan Tew Brydydd (pp. 53-5), Howel ab Reinallt (pp. 65-7), Siôn Phylip (pp. 90-4), Sir Huw Roberts Llên (pp. 94-7) and Siôn Tudur (pp. 127-31). It seems that neither of the two main hands in the volume belong to William Bodwrda, although it is likely that the manuscript served as the basis for one or more of William Bodwrda's folio manuscripts, particularly BL Add. 14966 and Mostyn 145 (NLW MS 3048D).