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A manuscript in the autograph of Evan Evans (Ieuan Fardd) containing a copy of Nennius's 'Eulogium Britanniæ' (ff. 1-57); notes relating to Nennius copied from a manuscript in the hand of Robert Vaughan, Hengwrt (ff. 67-88); triads copied from a manuscript in the hand of Robert Vaughan, Hengwrt, by Lewis Morris in 1738, with marginal and intertextual notes (ff. 89-112), and from the Red Book of Hergest (ff. 137-152); 'Araith Iolo Goch' (ff. 114-116); poetry, the poets cited including Aneirin, Iolo Goch and Mabclaf ap Llywarch (ff. 119-157b); etc. On f. 189 is a table of contents in a later hand. On f. iv the title page reads 'Y Cynfeirdd Cymreig, Vol. II'.
This manuscript is the source of the text of Series I of the Triads in the Myvyrian Archaiology Vol. ii, pp. 1-22. The englynion at ff. 119-122b are practically the same as those in Myvyrian Archaiology, pp. 543-547, col. i, but that the arrangement is different. The text at f. 132 was copied in September 1758 from an autograph manuscript of Edward Lhuyd. The text at f. 154 verso was transcribed from Llyfr Coch Nannau (see Mostyn MS 144) 'and collated it with my brother Lewis Morris MSS'.

Two volumes of transcripts, [1758], compiled Evan Evans (Ieuan Fardd), subsequently bound as one volume. Part I (foliated 1-153) contains 'The Gododin an Heroic poem of the sixth Century transcribed from a Copy of Thomas Wiliams of Trefriw M.D., and the Works of Taliessin from Dr Davies of Mallwyd's hand, and other particulars wrote by the Revd Mr. Evan Evans' (f. 1) and includes transcripts of Llyfr Aneirin (ff. 5 verso-36), Llyfr Taliesin (ff. 37-126) and other manuscripts.
Part II (foliated 1-73) contains further poetry, by poets including Llywarch Hen, Iolo Goch, Dafydd ab Edmwnd and Gutun Owain (ff. 1-28, 34 verso-47); notes on Welsh orthography (following the cywydd beginning at f. 19); a list of poets from a manuscript of Dr John Davies (f. 39 verso); a copy of Sir Thomas Wiliems's Preface to his Latin-Welsh Dictionary (ff. 48-64); a letter, dated 26 January 1757, from Lewis Morris to 'Mr. Vaughan of Corsygedol' (ff. 65-69); a letter, dated 14 June 1755, from Richard Morris to the same Mr Vaughan, enclosing a copy of the Transactions of the Society of Cymmrodorion and referring to Lewis Morris and to Goronwy Owen (ff. 70-71); and a table of contents for Part I only, [?in the hand of Owain Myfyr] (f. 72).

A composite volume containing transcripts of prose and verse items in the hand of Edward Williams ('Iolo Morganwg'). Pp. 1-80 contain transcripts of Welsh poems, almost entirely 'englynion', by, or attributed to, Llywelyn ab Rhosser 'o Sainffag[an]', Dafydd Llwyd Mathew, Dafydd ap Siencyn Fynglwyd, Richd. Watcins, vicar Llanellen, Thomas Llywelyn 'o Regoes', Llywelyn Thomas, Edwd. Dafydd 'o Fargam', Siôn y Cent, Siôn Morys 'o Lanfabon', Thomas Lewys 'o Lechau', Rhys Brychan, Hywel Bwr Bach, Huw Cae Llwyd, Dafydd Benwyn, Iorwerth Fynglwyd, Morys Cyffin, Hopcin Thomas 'o Faglan', Rhaff ab Rhobert, Siôn Tudur, Gwerfyl Mechain, Rhobert Cludro, Tudur Aled, Dafydd ap Edmwnd, Hywel ap Syr Matthew, Bleddyn Siôn 'o Lancarfan', Hywel Llwyd, Dafydd ap Gwilym, Siôn Philip 'o Hendrewaelod', Lewys Morys, Dafydd, abad Margam, Dafydd Dafies 'o Gastell Hywel', Iolo Morganwg, Huw Llwyd Cynfel, Siôn Cydewain, Llawdden, Syr Lewys Mochnant, Lewis Môn, Roger Cyffln, Syr Ifan o Garno, Wiliam Byrchinsha, Ednyfed Fychan, Cwnin Brydydd, Twm Siôn Catti, Lewys Morganwg, Rhys Brydydd, ? Lewys Glyn Cothi, Dafydd Nanmor, Jenkin Richards 'o Flaenau Gwent', Ieuan Gethin ab Ieuan ab Lleision, Siôn Brwynog, William Cynwal, Richard Huws, Dr. Morgan, esgob Llanelwy, Lewys Powel, William Middelton, Hopcin Tomas ab Einiawn, Elis Drwynhir, Harri ap Thomas ap Wiliam 'o'r Ddiserth', Grufydd Hiraethog, Morys Dwyfech, Owain Gronw, Hywel ap Rhys, Syr Lewys Gethin, Richard Cynwal, Roger y Gwydd, Edmwnd Prys, Dr. R. Davies, esgob Ty Ddewi, Rhys Cain, Huw Roberts Llun, Rhisiart Iorwerth 'o Langynwyd', ? Huw Ednyfed, Einion ap Dafydd Llwyd, Rhydderch Roberts, Syr Lewys y defaid, Syr Lewys Anwyl, Robert ab Han, Syr Ieuan Brydydd, Syr Owain ap Gwilym, Catherin ferch Howel, Wiliam Llyn, Owain Gwynedd, Dafydd Alaw, Evan Llwyd Sieffre, Morgan ap Huw Lewys, Robert Dafydd Llwyd, Wiliam ap Hywel ap Tomas, Morys Parri Llen, Ifan Siôn 'o Wedir', and Sils ap Siôn, and other unattributed poems. The inscriptions on p. 81 and p. 83 and the note on p. 82 appear to indicate that they were intended as cover and 'title-page' respectively for a home-made booklet containing a corpus of 'englynion' by Jenkin Richards of Blaenau Gwent, co. Monmouth, extracted mainly 'o Lyfrau Harri Siôn o Bont y Pwl a Llyfr ym Meddiant Rhys Thomas, Argraffydd o'r Bont Faen ym Morganwg', but only four 'englynion', presumably meant to be attributed to this poet, follow on p. 84. Pp. 91-198 contain miscellaneous items including 91-2, notes headed 'On the oldest places of Christian Worship in Wales'; (continued)

93-7, 105-06, notes, generally derogatory, on the character and literary and metallurgical activities of Lewis Morris; 100- 04, notes on 'Welsh Ideas of Celibacy'; 122-8, a transcript of thirty 'englynion' entitled 'Ymatreg Llywelyn a Gwrnerth' attributed to Tysiliaw fab Brochwel Ysgithrawc; 130, a note relating to an 'eisteddfod' held at Y Pil (Pyle, co. Glamorgan), 1740; 131- 41, notes relating to 'singing to the harp', the 'bardd telyn', carol and 'alsain' verse, the adapting of verse to music, etc.; 147-62, transcripts of 'englynion' attributed to Rhobert, Tywysog Norddmanty, Morys Kyffin, Wm. Byrchinsha, and Gutto'r Glyn, extracts from the works of various Welsh poets, etc.; 167, a version of William Midleton's introductory epistle [to his Bardhoniaeth neu brydydhiaeth, y llyfr kyntaf (Llundain, 1593)] copied 'Ex Vol. 40. Mr. Panton' [i.e. Panton MS.40 now NLW MS 2008]; 168-9, five stanzas of a hymn tune attributed to Elis Wynn; 169, a transcript of two 'englynion' attributed to Dr. [John] Davies; 171, a list of the commotes and hundreds of Glamorgan copied from '68. P.P.' [i.e. Panton MS 68 now NLW MS 2034]; 175-88, an alphabetical list of Welsh bards 'o Lyfr D'dd Ddu o'r Eryri'; and 188-98, miscellanea including transcripts of 'englynion' attributed to Siôn Mawddwy, Ieuan Tew, William Philip, and D[afydd] ab Gwilym, miscellaneous triads, genealogical data relating to various Welsh bards and Syr Rhys ap Thomas, etc. Pp. 207-390 (previously paginated 1-184) contain a collection of maxims, proverbs, triads, sayings, etc., attributed to Cattwg Ddoeth and described on a 'title-page' to the section ( p. 199) as 'Llyma Ddoethineb Cattwg Ddoeth o Lancarvan' and in a concluding note (p. 390) as 'Llyfr y cyntaf y Gwyddfardd Cyfarwydd'. In a note on the aforementioned 'title-page' (p. 199) Edward Williams claims to have transcribed this collection in 1799 from a manuscript in the possession of Siams Thomas of Maerdy Newydd, co. Glamorgan. Preceding and following the actual text of the collection are transcripts of a prefatory letter dated 1685 (pp. 201-06) and of the concluding note already referred to (p. 390) both of which are attributed to the Glamorgan scribe and copyist Thomas ab Iefan of Tre Bryn as compiler of the manuscript from which Edward Williams was allegedly copying (see TLLM, t. 172; IM, tt. 291-4). Pp. 391-477 contain a transcript of a collection, in alphabetical order, of over three thousand Welsh proverbs attributed to Cattwg Ddoeth ('Llyma Ddiarhebion Cattwg Ddoeth . . . sef yw hwnn Ail Lyfr y Gwyddfardd Cyvarwydd'). This collection, according to the aforementioned note at the end of the preceding section (p. 390) attributed to Thomas ab Iefan, had been compiled by the said Thomas from various sources and formed a continuation of the previous section. Edward Williams's claim with regard to the Siams Thomas volume is probably intended to apply to the contents of pp. 391-477 as well. The contents of pp. 199-390 have been published in The Myvyrian Archaiology of Wales . . ., vol. III (London, 1807), pp. 1-99.

A composite volume of transcripts in the hand of Owen Jones ('Manoethwy'). The contents include 'cywyddau', 'awdlau', 'englynion', 'carolau' and 'cerddi' by Ifan Tew Brydydd, Hari ap Howel alias Harri Hir, Wiliam Cynwal, Sion Tudur, Morus Dwyfech, Gruffudd Hiraethog, Sr. Dafydd Llwyd Ysgolhaig, Llywelyn ap Gytyn, Guto'r Glyn, Hywel D'd Bevan ap Rhys ('o Sir Fon'), Rhydderch ap Sion, Dafydd Nanmor, Rhys Goch o Eryri, Huw Arwystl, Morys ap Ifan ap Einion ('Morus Dwyfach Medd MS arall') Sr. Dafydd Trefor ('Dr. John Kent ... Medd MSS M.P.', 'Sion Dafydd Trefor ... Medd MSS L.O.'), Howel ap Reinalld, Mredydd ap Rhys, Gruffudd D'd ap Howel, Rhisiart ap Howel Da 'Beinion, Bedo Phylip Bach ('Rhai a ddywaid mae Deio ap I'n Du ai Cant... '), Huw Pennant, Sion y Kent, Lewis Glyn Cothi, Edward Maelor '('Mae'n debig mae Edward ap Rhys Maelor ydyw Hwn... '), Dafydd ap Gwilim, Iolo Goch, Simwnt Vychan, Sr. Huw Jones ('Vicar Llanfair ynyffryn Clwyd'), Tudur Aled, Dafydd Llwyd ap Llew ap Gruff., Sion Brwynog, Iorwerth Fynglwyd, Taliesyn Aneurin G[wawdrydd], Maer Glas ('medd rhai'), Robin Ddu, Owain Twna, Dafydd Gorllech, Ifan Brydydd Hir, Edward [ap Rhys], Ie : Dyfi, Llywelyn ap Owain, Thomas Prys ('o Blasiolyn Esquire'), Edmund Prys, G[ruffydd] Philip, W. Elias (1730), Owain Gruffydd, Gruffydd Nannau (1654), Owain Gwynedd, Thomas Owen (1730), William Llyn, Tudur Penllyn, Huw Kae Llwyd, Llywelyn Goch Amheurig Hen, Edward Davies (Rhiwlas), Rich. Abram, Moris ab Evan ab David, Cadwaladr Roberts (ab Robert), Dafydd ab Sienkin, Richard [Davies] ('Esgob Dewi'), Ragiar [sic] Kyffin, Huw Morys, Arthur Jones (1734), Mathew Owain, Ellis Cadwaladr, Moris Rhobert ('o Sir Feirionydd'), Thomas Davies ('o Sir Drefaldwyn'), Robert Cadwalad[r] ('o Blwy Pennant'), Richd. Thomas D'd ('o Sir Fon'), Richard Ffoulkes, John Edwards, John Hughes, Moris ab Evan ap Dafydd ('o Lanoge'), Sion Ffoulke, Sion ab William Griffith ('o Lanfihangel ... '), Sion Phylip, G[ruffudd] Leiaf, D. Sion, W[iliam] Phylip, Rhisiart Philyp, H. ab Evan, [John Davies] 'Sion Davydd Las', Lewis Owain, Morgan Dafydd, Edwart Morris and Robert Klidro, and anonymous poems; 'englynion', etc. by contemporary poets, largely of the Richards (Darowen) circle of friends e.g. John Evans ('Ioan Maelor'), W[alte]r Davies ('Gwallter Mechain'),' R[ober]t Davies ['Bardd Nantglyn'], 'G. Brwynog', R[owland] P[arry] (Carndochan), H. K. (1851), Phoebe neu Eunice Jones (Llynlleifiad), [Peter Jones] 'Pedr Fardd', [William Edwards] 'Gwilym Padarn', [Morris Jones] 'Meurig Idris' and J. Blackwell ('Alun'), and anonymous poems; 'Sidanen Or a Song in Praise of the Glorious Queen Elizabeth' by Edward ap Rhys Wynne ap William Prys of Clygyrog, 'The meritorious gratulation of Esqr. Strangways to Llangedwyn ...' by John Davies, and anonymous English poems; prose texts, in some cases two copies, of 'Tri thlws ar ddeg o Frenindlysau Ynys Brydain ... ', 'Drygioni Medd'dod', 'Dewis bethau Howel lygad Cwsg', 'Trws'neiddrwydd Gruffydd ap Adda ap D'd', 'Achau Llewelyn ap Gruffydd y Tywysog diwaethaf o'r Cymru', 'Ymddiddanion ffraethion Cynhengras a fu rhwng y Pawn bach o Wickwair yn y Rhôs Is Conwy a Gwgon o Gaer Einion y Mhowys. A elwir yn gyffredin Araith Wgon', 'Cronigl Cymru a Lloy(e)gr yn amgyffred fal y treuthir isod' (with an additional 'narration' by Rice Jones), 'Taliesin a'i traethodd', 'Rhwng Merddin a Gwenddydd ei chwaer' and 'Merddin a Gwenddydd', 'The Most noted Poems in Mr Bulkeley of Brynddu's Collection' (now NLW MS832); 'An account of the wages paid the workemen for raissing a fence upon Ceiriog under Pentre gwyn a Tenem[en]t of the Hond. John Myddelton Esqr.', with a covering letter from Richd. Ffoulkes (transcribed from Cwrtmawr MS 222, p. 57v.); a power of attorney from Oliv[er] Thomas, Shrewsbury, yeoman to John Thomas Rees, Llanymowthwey, Merioneth, yeoman, 1674 (original in Cwrtmawr MS 222, p. 61) and a letter relating thereto from Robert Vaughan, Salop to John Thomas Rees (original in Cwrtmawr MS74, No. 3); records of the births and baptisms, 1712-33 [at Llansilin], of the children of Richard Ffoulkes (original in Cwrtmawr MS 222, p. 60v); transcripts of fifty-nine letters of Walter Davies ('Gwallter Mechain'), 1793-1831 and undated, largely addressed to Thomas Richards at Berriew and Llangynyw; a prospectus, 1793, of 'Celtic Remains' in two volumes, the first by 'the Late Lewis Morris Esq.' and the second by Walter Davies, All-Souls College, Oxford; letters largely to Thomas Richards, Berriew and Llangynyw or David Richards ('Dewi Silin') from Peter Bayley Williams, Llanrug, 1828, John Jones ('Tegyd'), Christ Church, Oxford, 1819-22 and undated, W[illiam van Mildert] bishop of Llandaff, 1822, D. Davies, Chester, 1825, Wm. Owen Pughe, London, 1812-19, Ebenezer Thomas ('Eben Fardd'), Llangybi, 1824, Robt. Parry ('Robyn Ddu Eryri'), 1824 and undated, Tho. Jones, Long Acre, London, 1825, W. Owen ('Eos Glan Hafren'), Newtown, 1824, John Roberts, Tremeirchion, 1822, Robt. Davies ['Bardd Nantglyn'], 1825 and undated, and A[neurin] Owen, [Nantglyn], 1821; a list of titles and first couplets of the poems of Dafydd ap Gwilym; 'Llyma henwe y 24 brenin or brutanied... ' (originally from a manuscript of William Thomas, Llanallgo). Inset at the end of the volume are transcripts of Montgomeryshire pedigrees, etc. Much of the material in the volume has been transcribed from other volumes now in the Cwrtmawr Collection (e.g. MSS 200, 222, 242 and 243) and there are references to such sources as 'un o lyfrau Maesglas Mallwyd' (transcribed in 1857) (p. 269), a manuscript in the hand of Robert Arthur (p. 342), 'Llyfr ym meddiant Lowri Jones' (p. 380), etc. A note pasted on the inside of the upper cover states 'This Vol. was copied by Owen Jones (brother of Myrddin Fardd) from a MS Vol. ... in the handwriting of Lewis Morris [Cwrtmawr MS 200] now at Bryntanad, Llanerfyl Montgomerys[hire] (Richards) E. Breese'. Owen Jones was for a short time a private tutor at BrynTanad (see The Dictionary of Welsh Biography). The spine is lettered 'Mannoethwy MSS'.

A copy of Charles Ashton: Gweithiau Iolo Goch gyda nodiadau hanesyddol a beirniadol (Croesoswallt, 1896), with annotations, some if not all by J. H. Davies. Inside the volume is a notebook probably in the autograph of Charles Ashton containing a list of the poems of Iolo Goch, with particulars of sources, etc., a shorter list in the autograph of D. Silvan Evans with a reference to a manuscript (then at Llanwrin, now Cwrtmawr MS 325) in the autograph of Wiliam Henri [sic] Mounsey, 1859, and a letter, [19]22, from Henry Lewis, Swansea to Principal [J. H.] Davies.

A facsimile manuscript in two parts mostly in the hand of William Watkin Edward Wynne. The first part comprises copies (some printed) of charters, public records, deeds, pedigrees, poetry, etc. of Merionethshire and Caernarvonshire interest, some of which are taken from transcripts made by Robert Vaughan, Hengwrt. The material includes records and pedigrees relating to the Wynn family of Peniarth; notes on the Maurice and Owen families of Clenennau, Penmorfa, Caernarvonshire, with related deeds possibly in the hand of William Maurice of Llansilin; deeds relating to the Porkington estate; an extent of the commote of Eifionydd, 1352; an extract from the Coroner's Rolls for Merionethshire, 1345; charters of Castell y Bere and Harlech Castle; pedigrees of Madog ap Dafydd of Hendwr, Llandrillo, Merionethshire; an ode to Einion ap Gruffydd of Corsygedol by Gruffudd Gryg; odes to Dafydd ab Ieuan ab Einion by Guto'r Glyn and Dafydd Nanmor; letters addressed to W. W. E. Wynne, the correspondents including Walter Davies ('Gwallter Mechain'); etc. The second part is also mostly in the hand of W. W. E. Wynne and again comprises material mainly of Merionethshire and Caernarvonshire interest, including pedigrees, correspondence, deeds, etc. relating to the Porkington estate and to the Maurice family and to the Wynne family of Glyn and Ystumcegid, Caernarvonshire; poetry relating to members of the Wynn family of Glyn by Huw Machno, Rhisiart Cynwal and others (one elegy translated into English); press cuttings taken from the Cambrian News, 1879; letters addressed to W. W. E. Wynne, the correspondents including Walter Davies ('Gwallter Mechain') and Joseph Morris; etc.

A manuscript in the hand of Lewis Morris ('Llewelyn Ddu o Fôn; 1701-65) based on a volume entitled 'Mysteria Kabalae Bardicae' and on other sources quoted by the scribe. It contains poetry by Taliesyn, Merddin, Rhys fardd, Gronw ddu o Fon, Ll'n ap Owain, Y Bardd Cwsg, Y Ffreier Bacwn, Robin Ddu, Davydd ap Gwilim, Llowarch Offeiriad, Iolo Goch, Sr Roger y ffeiriad, Huw ap Rhisiart ap Dld, Bleddyn Fardd, Gronwy Gyrriog, Gruffyth Gryg, Alis verch Gryffyth ap Ieuan, Iefan ap Rhydderch ap Ievan Llwyd, D'd Nanmor, Gvttor Glyn, Tvdvr Aled, Sion Brwynog, Gyttvn Owain, Tvdvr Penllyn, Gruffydd Llwyd ap Davydd ap Einion, Simwnt Vychan, Sion Keri, Ieuan ap Tudur Penllyn, Llewelyn ap Guttyn, Lewis Mon, Sion ap Howel ap Ll'n Vychan, Gruff. ap Ieuan ap Ll'n V'n, Rhys Meigen, Deio ap Ieuan Du, Lewis ab Edwart, Gronw ap Ednyfed, Sion Tudr, Bedo Eurddrem, Huw Arwystl, Ll'n Brydydd Hodnant, Robt. Puw, Edward Morris (Perthi Llwydion), Huw Morys, Lewis Morris, Rhys Cain, and anonymous poetry; 'Llyma freuddwyd Grono ddu o fôn'; 'Prophwydoliaeth Ddewi'; 'Prophwydoliaeth yr Eryr o Gaer Septon'; 'Prophwydoliaeth y Doctor Banystr'; 'Prophwydoliaethau Robin ddu'; a list of, and extracts from poems, by Dafydd Lloyd ap Llewelyn ap Gryffydd; 'Araith Iolo Goch'; notes from a manuscript in the hand of Thomas Prys of Plas Iolyn; 'The British Triades' translated from a copy in the hand of Mr [Robert] Vaughan of Hengwrt; 'Achau'r Cwrw a'i Fonedd a'i Hanes'; 'Some Remarks upon the Commodities of Anglesey, & Quaere wh. ye Laziness of the Inhabitants be not a great Cause of their Poverty & Want of Trade'; 'Achau Elsbeth Brenhines Lloegr'; etc. The volume was begun in 1726, and there are some additions to the year 1759. There are a few entries by Peter Bailey Williams (1821), and also by St Geo[rge] Armstrong Williams, who has included a short biography of Lewis Morris.

An imperfect volume in the hand of Edward Lhuyd containing ['Araith Siôn Tudur']; 'cywyddau' largely by Tomas Prys and D[afydd] ab G[wilym], but with a few by Sion Dafydd Lâs, Wiliam Llun, William Fylip, Sion Filip, Sion Tudur, Sion Morgan (1689), and Owain Gwynedd, and '[Araith] Wgon'. Laid down on the fly-leaf is a note in the hand of E. G. B. Phillimore identifying the scribe.

A composite manuscript in the hand of David Richards (1725-82), curate of Llanegwad, Carmarthenshire containing 'cywyddau', etc. by Lewys Glyn Cothi, Raff ap Robert, Lewys Daron, Lewys Menai, W[ilia]m Llyn, Ie[a]'n ap Madog, and Dafydd ap Gwilym, and anonymous poems; 'englynion' by D[afyd]d ap Edmwnt, [Richard Davies] ('Escob Dewi') and H[uw] Lewis; extracts from 'cywyddau' by Ieuan Tew Brydydd, I[euan] Deulwyn, R[h]is[iart] Philyp, Sion Tudur, H[uw] Llwyd [Cynfal], and T[homas] Prys; extracts from William Baxter: Glossarium Antiquitatum Britannicarum ... (Londini, 1719); a stanza by [John] Dryden in honour of St David's Day; lists of contents of 'Hen Lyfr Carpiop [sic] B[en] Simon'; 'Llyfr Dauliw Ben Simon', and 'Llyfr y Brut Ben Simon'; 'Englynion y Misoedd' by Aneurin Gwawdrydd; 'Llyma Ddifregwawd Taliesin'; 'Llyma Ystori Owain ap Urien Reged'; 'Llyma val y Cafad Taliessin'; 'Llyma Ystori Saith doethion Rhufain'; 'Cyngor Arystotlys i Alexander mawr i ydnabod'; lists of words from the poetry of D[afydd ap] G[wilym] quoted in John Davies: Dictionarium Duplex, etc. The name of the scribe occurs twice on one of the fly-leaves.

An imperfect volume containing 'cywyddau', etc. by Thomas Prys, Robt. Lewis, Iolo Goch, Gutto or Glynn, Richard Kynwal, Robt ap Rees Wynn ('o Arianog'), Rowland Vychan, Richard Kynfol, Y Prydydd Hael, Evan Deulwyn, Doctor Sion Kent, Edward Mayelor, D'd ap Gwilim, Tudur Aled, Risiart Gele, Sion Tudur, Simwnt Vychan, Ievan Gethin ap Ie'nn ap Lleision, Evan Lloyd brydydd, Madog Benfras, Howel Gethin, Llowdden, Sion Phillip, Robt. Clidro, Sion Brwynog, Dafydd ap Rys ap Evenni?, D'd ap Edmund, Gruffydd Grvg, Mredydd ap Rees, William Llyn, and Rees Wynne, and anonymous poems; and poems in free metres by Rydderch Roberts and Ifan Llwyd Sieffrey. Later additions include a few medical recipes and copious marginal arithmetical calculations. The text, according to a note by J. H. Davies on the fly-leaf, was used by the writer of NLW MS 717, and the manuscript in fact bears an example of his hand. The spine is lettered 'Poetry'.

An incomplete and badly mutilated manuscript of the early seventeenth century containing 'cywyddau' by Gruffith ap Ieuan, Ifann Deulwyn, Bedo Aerddrain, Llywelyn ap D'd Fychan, Sion Tudur, Lewis Mon, Dafydd ap Gwilim, etc., and anonymous 'englynion'. The poems are written on the dorse of folded late sixteenth century answers to interrogatories in legal actions.

A copy of Rhys Jones (ed.): Gorchestion Beirdd Cymru ... (Amwythig, 1773), with copious late eighteenth century manuscript additions entered partly in the margin and partly (largely) on bound-in leaves at the beginning and the end. The majority of the additions are in the hand of Jacob Jones, recipient of the volume (see note, below). These consist mainly of prose texts of 'a Letter written by our Blessed Lord and Saviour Jesus Christ and found 18 miles from Iconium 65 years after Our Saviour's Crucifixion ...', 'King Agbarus's Letter' and 'Our Saviour's Answer', and 'Sentulius's Epistle to the Senate of Rome'; culinary and medical recipes ('Receipts of Sundries'); and 'cywyddau', 'englynion', 'cerddi', metrical psalms, etc. by William Edward, W. Evans, Mr Goronwy Owen, Jacob Jones, Dafydd Davies ('Llongwr', 'ai Dwedod yn Aberdyfi Meirion 1773'), 'Tad gwehydd Sychnant sir feirion', [David Jones] ('Dewi Fardd'), Hu Jones (Llangwm), J. Jenkins, Taliesin, Ann Fochan [sic], ?Hugh Jones (Glan Conwy), Mathew Owen ('o Langar'), [Thomas Edwards] ('Twm o'r Nant'), Mr Risiart Rhys ('Or Gwerllwyn, Ym Merthyr Tydfil, yn Swydd Trefaldwyn'), Jno. Roberts ('Almanaccwr Caer Gybimon'), Huw ap Huw, Dafydd Jones ('or Penrhyn deudraeth'), Mr Jones ('Ficcar Llanbryn Mair'), Elis Rowland, Ellis Roberts ('y Cowper'), Ioan ab William, T. ab G., Hugh ab Sion, Edmund Prys, Robert Jones, John Peters, Wm. Griffiths, Thos. Jones, Huw Rob[erts], Edward Jones, Ierwerth Fynglwyd, Howel Daf[ydd] ap Ieuan ap Rhys, Tudur Aled, William Llun, John Phillip, Lewis Morys ('Llywelyn ddu'), Llywarch hen, Dafydd Nanmor, Bleddyn Fardd, Gruffydd ap yr Ynad Coch, 'one of the Parry's of Newmarket', Dafydd Brydydd Hir ('o Lanfair' dôl Haearn'), William Williams, Aneuryn Gwawdrydd, [David Thomas ('Dafydd Ddu Eryri')] and Jonathn Hughes, and from printed sources.

A volume of poetry and some prose texts in the hand of Lewis Morris ('Llywelyn Ddu o Fôn, 1701-65) entitled 'Trysor-Gell Barddoniaeth Neu Gynhulliad o ddisgleiriaf waith yr Hyglod Feirdd Cymreig yr hwn yn hywir a ellir ei alw Lepor Museus h.y. Melysdra Barddoniaeth ... Gan Lewis Morris, Philomath. o Lanvihangel ymhenrhos yn Môn-ynys. Bl.'r Arg. 1724,' together with the addition 'yn Ieuanc ac yn ddigon diwybodaeth, medd yr un L. M. yn y flwyddyn 1759' which contains 'Tri thlws a'r ddeg o Frenindlysau ynys Brydain ...'; 'Drygioni Medddod'; Welsh poetry, almost entirely 'cywyddau', by Lewis Glyn Cothi, Sr. Davydd Trefor, Gruffydd Hiraethog, Howel ap Reinalld, Davydd ap Gwilym, Simwnt Vychan, Aneuryn Wawdrydd, Sion Tudur, Maer Glas?, Mabclaf ap Llywarch, Mredydd ap Rhys, Tudur Aled, Huw Pennant, Gruffudd D'd ap howel, Rhisiart ap howel Da. Beinion, Huw Arwystl, Morys ap Ifan ap Einion, Dafydd Nanmor, Rhys Goch o Eryri, Bedo Phylip bach, Sion y Kent, Ifan tew Brydydd, Mr Harri ap Hoel alias Harri Hir, William Cynwal, Rhydderch ap Sion ('Poor Poetry. L.M.'), Edward Maelor ('Mae'n debig mae Edward ap rhys maelor ydyw ...'), Iolo Goch, Sr. Huw Jones ('Bicar Llanvair ynyffryn Clwyd'), Morus Dwyfech, Sr. Dafydd Lloyd ysgolhaig; Gutto'r Glyn, Davydd ap Edmwnt, Dafydd Llwyd ap Lle'n ap Gruff., Llywelyn ap Gytyn, Hywel D'd Bevan ap rhys, Wiliam Lyn, Sion Brwynog, Iorwerth fynglwyd, and Taliesyn, with copious marginal variants and annotations by Lewis Morris; 'Taliesyn a ddowaid mae dewisa gwr oedd fal hyn. 1 Gwr a fo athro'n ei dy ...'; 'Dewis Bethau Howel lygad Cwsg'; 'Twrsneiddrwydd Gruffydd ap Adda ap D'd'; 'Sidanen, or a Song In Praise of the Glorious Queen Elizabeth' by Edward ap Rhys Wynne ap William Prys of Clygyrog in Anglesey, Fellow of Wadham Coll., Oxon.; 'Cronigl Cymru a Lloegr' transcribed, with annotations, by Lewis Morris, Dulas, September 1727, from a manuscript written in 1571 by Rice Jones [BM Add. MS 14894]; 'Ymddiddanion ffraethion Cymhengras a fu rhwng y Pawn bach o Wickwair yn y rhôs Is Conwy a Gwgon o Gaer einion ymhowys a elwir yn Gyffredin Araith Wgon'; a treatise, being 'a Preface to a Book Composd by me L. M. Entitul'd Yswelediad Byr or Holl Gelfyddydau a gwybodaethau Enwogcaf yn y Byd. June 1729' ('A poor preface indeed says L. M. 1759'); 'The Most Noted Poems in Mr. Bulkeley of Brynddu's Collection [i.e., 'Llyfr Gwyn Mechell', now NLW MS 832]; and 'Achau Llewelyn ap Gruffudd y Twysog diwaethaf o'r Cymru', transcribed in 1725 ('... allan o Lyfr Scrifen hen ddihennydd ... Llyfr fy hendaid'). Preceding the texts are a list of contents ('Taflen o gynhwysiad y Llyfr') and a list of names of the poets represented in the volume ('Enwau'r Awdwyr a Sgrifenasant y Caniadau yn y Llyfr hwn'). There are notes and memoranda on the fly-leaves by Lewis Morris and John Morgan. Inside the lower cover is a bill-head of the Wynnstay Arms Hotel or Eagles Inn, Machynlleth. Mary Richards [presumably of Darowen], whose bookplate appears inside the upper cover of the volume, has subsequently added transcripts of 'awdlau' and 'cywyddau' by Sion Tudur, Lewis Glynn Kothi, Tudu[r] Aled, Iorwerth Fynglwyd, Gruffudd ap Jenkin ap Llywelyn Vychan, [William Llyn] pp. 352-51, Iolo Goch, Raff ab Robert, Henri Humphreys, and Dafydd ap Gwilim.

A composite volume comprising three exercise books and insets largely in the hands of Thomas Richards, Darowen and David Richards, Llansilin. The contents include a list of names, ages and dates of death of 176 eminent ecclesiastics ('Cofrestr o Enwau, Oedran ac amser marwolaeth y Gwyr enwog canlynol ... '); a tract, 1753 (transcribed 1822), explaining the reasons for the adoption in Great Britain in 1752 of the Gregorian or New Style Calendar ('... y Rhesymmau amlycaf paham y gwnaed y cyfnewidiad diweddar yn y Flwyddyn, ydys yn alw yr Ysteil newydd'); short biographies of early and late British historians ('Ychydig o hanes yr Awdwyr mwyaf hynod a ysgrifennasant am y Brutaniaid yn yr Ynys hon yn gynar ac yn ddiweddar ...'), based on Joshua Thomas: Hanes y Bedyddwyr, Ymhlith y Cymry... (Caerfyrddin, 1778); 'Ymddiddan Myrddin a Gwenddydd' and prophecies attributed to Myrddin and Taliesin; prophetic poetry ('cywyddau', etc.) by Dafydd Llwyd Llewelin ap Griffydd, ?Griffidd ap Dafydd Fychan, Robin Ddu, Owain Twna, Dafydd Gorllech, Ifan Brydydd hir, Huw Pennant, Edwart [ap Rhys], Dr Sion Cent, Ie[uan] Dyfi, Iolo Goch, ?Meredith ap R[hys], Llywelin ap Owain, Rhys Goch or Yri, Thomas Prys (Plas Iolyn), etc.; 'englynion' by Davydd Richard ('D[ewi] Silin') and [John Jones] ('Myllin'); Awdl i'r olygfa o ben clochdy St Paul, Llundain, 1825, by [William Williams] ('Gwilym Cyfeiliog); 'Awdl Ymweliad ei Fawrhydi Sior y Pedwerydd ag ynys Fon' by [William Ellis Jones] ('G[wilym] Cawrdaf') (said in an accompanying note by Mary Richards to be in the hand of Evan Evans ('Ieuan Glan Geirionydd'); 'Coelbren y Beirdd'; a table of first lines of 'cywyddau', etc. by mediaeval Welsh bards; a list of titles of books of Welsh poetry and pedigrees, etc. The first exercise book, belonging to Thomas Richards, is dated 1814 and the second and third, belonging to David Richards, 1811-14?

A volume in the hand of D. Silvan Evans containing 'awdlau' and 'cywyddau' by Wiliam Lleyn. The transcripts were made c. 1869 and appear to be taken from more than one source, e.g. a manuscript of Paul Panton, 1779, and a manuscript of W. H. Mounsey based on a manuscript in the hand of [Owen Jones] 'Owen Myfyr'. At the end are 'Tri o'r Chwe Englyn a ddywedir i Ddafydd ab Gwilym wneuthur ar ei Glaf-wely' transcribed by D. Silvan Evans from a manuscript in the hand of ?D[avid] Ellis [Cricieth]. Beginning at the end are three pages of notes on 'Matter'.

An imperfect composite volume written in a number of hands but mainly in a late sixteenth century hand. The following note by J. H. Davies is written on one of the upper fly-leaves: 'This MS is supposed to be in the hand of Sion Brwynog (see Cwrtmawr MS 11.493). It was copied by the Rev. David Ellis, then of Amlwch in 1777 and was then perfect. The copy is now MS 11 in my collection'. This supposition cannot be correct since Siôn Brwynog died in 1562 and some of the poems were composed after that date. The hand also differs from that in Peniarth MS 61 which J. Gwenogvryn Evans tentatively attributed to Siôn Brwynog (See also Eurys I. Rowlands 'Llaw dybiedig Siôn Brwynog', Cylchgrawn Llyfrgell Genedlaethol Cymru (The National Library of Wales Journal), Vol. VII, pp. 381-2). The volume contains 'cywyddau' and a few 'awdlau' by Mathew Bromffild, Tudur Aled, Jhon Brwynog, Lewys Mon, Jhon Tudur, Rys Goch Glynn Dyfrdwy, Morys ap Ieuan ap Einion [Morus Dwyfech], Gwilym ap Sefnyn, Gvttor Glynn, Howel Reinalld, Wiliam Llyn, Lewis Daron, Dafydd Pennant, Roger Kyffin, Gwilym ap Ifan Hen, Gvttvn Owain, Cynwig ap Dafydd Goch, Owain ap Ll[ewelyn ap y] Moel, Rys Goch yr Yri (Rys goch ap D'd), Robin Ddv Fardd, Tudur Penllyn, Rys Pennarth, Lewys ap Edwart, Lewys Daron, Lewys Menai, Robert Ifans, Lewys Morgannwg, Owain Waed Ta, Gruff. Gryg, Iolo Goch, Grvffydd Llwyd ap D'd ap Einion and Hvw Pennant; English verses by J[o]hn Powell and Hu: Powell; etc. There are marginal and other annotations by William Maurice, Cefn-y-braich, ?William Wynn, Llangynhafal and David Ellis, Cricieth, and a transcript by the latter of the greater part of the volume forms Part II of Cwrtmawr MS 11. Some of the pages which have been repaired have also been made up by a later hand and the ink in these portions has faded badly. One page of the volume has been made up by J. H. Davies. The spine is lettered 'Llyfr Kywyddau'.

A composite volume containing a list in the hand of the Reverend Robert Williams, Rhydycroesau of titles and opening couplets of 'cywyddau', 'awdlau', etc. by Rhys Goch Eryri, Robin ddu ('o Hiraddug'), Sion Tudur, Dafydd Llwyd ap Llewelyn ap Gruffydd ('o Fathafarn'), Sion Prys (Caerddinen), Iolo Goch, Dafydd ab Gwilym, Tudyr Aled, Edwart Ralph, Guto'r Glyn, Dafydd Gorloch [sic], Robert Clidro, Syr Thomas Chwith, Owain Gwynedd, Edmund Prys, Dr Sion Cent, Meredydd ap Rhys, Lewis Glyn Cothi, William Cynwal, Sion Brwynog, Llawdden, Dafydd ab Edmund, Dafydd Nanmor, William Lleyn, Simwnt Fychan, Thomas Prys (Plasiolyn), Rees Ednyfed, Thomas Evans, Huw Arwystli, Llewelyn ap Owain ap Cynrig, Gruffydd ap Efan ap Llewelyn Fychan, Llewelyn Amredydd ab Ednyfed, Edward ap Rhys, Robert Dafydd Llwyd (Aber gwyn gregin), Owain Gruffydd (Llanystumdwy), Watkin Clywedog and [John Davies] ('Sion Dafydd Las'); transcripts by Howel Lloyd, with copious annotations, of two 'cywyddau' by Iolo Goch; transcripts (paper water-marked 1827) of 'cywyddau' by Doctor Sion Kemp, Sion Phylip, Evan llwyd brydydd, Wiliam llyn, Sion tudur, Robart ap Rys wynn ('o raeanog'), Iolo goch, Tudur penllyn, Gutto'r glynn, Huw ap Dafydd, Gruffudd hiraethog, Ifan ap tudur penllyn, Howel Reinallt, Rys goch oryri, Tudur Aled, Ierwerth fynglwyd, Dafydd llwyd ap ll'n ap gruffudd, Robin ddu ap siankin, Gwilym ap sefnyn, Lewis mon, Lewis Daron and Dafydd ap gwilim, and a Cornish vocabulary (from BM Cotton Vesp, MS A. XIV). The spine is lettered 'Poetry MS'.

A volume of 'cywyddau', etc. transcribed by W[illiam] H[enry] Mounsey in 1859 from manuscripts in the British Museum ('Barddoniaeth sef Casgliad O Waith Beirdd Cymru. Tynwyd allan y Casgiad hwn O Ysgriflyfrau yn yr Amgueddfa Brydeinig Genyf fi, Wiliam Henri Mounsey O Gaerliwelyd [sic] yn Sir Cwmberland. 1859'), together with annotations by D. Silvan Evans. The poets represented are Iolo Goch, Llywelyn Moel y Pantri, Gruffydd Gryg, Iorwerth Cyriog, Gutto'r Glyn, Iorwerth Vynglwyd, Lewis Morganwg, Sefnyn, Sippyn Cyfeiliog, Syr D[afydd] Trefor, Robin Ddu ('hynaf, o Fôn'), Rhys Goch Eryri, Doctor Sion Cent, Rhys Brydydd, Llawdden, Dafydd Nanmor, Dafydd ap Edmwnt, Guttyn Owain, Deio ap Ieuan Du, Llewelyn ap Guttyn, Gruffydd Hiraethog, William Cynwal, Sion Tudur, William Lleyn, Morus Kyffin, Mredydd ap Rhys, Robert Dai Llwyd and Sion Gruffudd ('o Llanddyfnan'). There is a list of contents ('Cynnwysiad') at the beginning of the volume. Among the illustrations and cut-outs mounted on the fly-leaves and in blank spaces in the manuscript are engravings of Montgomery Castle, the Fall of the Ogwen, Conway Tubular Bridge and Castle, Llyn Idwall, Rhaiadr Du near Tan y Bwlch, Moel y Gest, Denbigh, Snowden [sic] and Llanberis Lake, Valle Cruces Abbey and Pont Aberglaslyn. The spine is lettered 'Casgliad o Waith Beirdd Cymru. W. H. Mounsey. 1859'.

Two notebooks in the autograph of John Jones ('Myrddin Fardd') containing transcripts of 'cywyddau', etc. by the following poets: Wiliam Llyn, Huw Llyn, Morys Dwyfech, Lewis Daron, Sion Wyn Owain, Kadwaladr Kesel, Huw Machno, Edmwnd Prys, Sion Philipp, Gruffydd Phylips, Huw Pennant, Lewis Menai, Wiliam Kynwal, Rissiart Philip, Richard Kynwal, Rhus Kain, Howel Reinallt, Sion Brwynog, Watkin Klewedog, Morgan ap Huw Lewis, Inco Brydydd, Dafydd Na[n]mor, Gruffudd Grug, Iolo Goch, Owain Waed da and Llywelyn Goch ap Meurig hên. Nearly all the poems are eulogies of, or elegies on , persons from Llŷn and Eifionydd. On the first page of MS 507 is the following note by J. H. Davies: 'Codwyd o lawysgrif Mr J. Glyn Davies ? Gan Myrddin Fardd' and it seems probable that the contents of MS 507 and the first ten items in MS 508 were transcribed from J. Glyn Davies MS 2 (though not in the same order), perhaps with a view to publication. The remaining poems appear to have been transcribed from various sources, including Cwrtmawr MS 454. Pasted in after the poems in MS 508 are two newspaper cuttings relating to 'Phylipiaid Ardudwy'.

A volume containing poetry ('cywyddau', 'englynion', etc.) and a few prose items transcribed by the Reverend Owen Jones (1833-99) from various manuscript and printed sources, chiefly NLW MS 644 ('Llyfr Robert Hwmffra'), NLW MS 560 (Celynog 34), which is referred to here as 'MSS D', Bangor MS 15599, referred to here as 'MSS B = S[iôn] P[owel]', and a manuscript referred to as 'Bodilan MSS'. The Bodilan manuscript appears to have been written by Robert Thomas, 1730, and the poets, instances of whose work have been transcribed from this source, include Iolo Goch, Dafydd ab Gwilym, Madoc ap grono gethin, Mredydd Brydydd, Dafydd Nanmor, John Cent, D[r] G[ruffudd] R[oberts], Hugh Arwystl, Howel ab Surr Mathew, William ab Sion Wyn, D. M,, Efan ab Ridsiard, Robert John Evan, E. Thomas, Edward Davies, [Siôn Tudur], John Philips, Dr. [?Sr] Gr. fain, Lewis Lloyd, E. ?M., Moris ab Robert or Bala, Lewis Sion, William Humphrey and Thomas Lloyd ienga o Benma(e)n. The prose items include 'Achau'r Cwrw ai fonedd ai Hanes ai Gyneddfau ai wrthiau' from an unnamed source. There is also a copy of 'Cywydd am Enedigaeth a dyfodiad ein Iachawdwr Iesu Grist i'r byd yn y Cnawd ...' by Huw Huws o Fon (source not given).