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A composite volume containing transcripts by Edward Williams ('Iolo Morganwg') of Welsh poems, mainly strict-metre verse in the form of 'cywyddau', attributed to Syr Dafydd Owain, Huw Dafydd Llwyd, Ieuan ap Hywel Swrdwal, Llawdden, Dafydd Llwyd Matthew, Siôn Mowddwy, Rhobin Ddu 'o Fôn', Siôn Tudur, Syr Dafydd Llwyd Fach or Syr Dafydd Llwyd Ysgolhaig, Lewis Glyn Cothi, Huw Pennant, Rhosser Cyffin, Person Llanberis, Dafydd ap Dafydd Llwyd, Thomas Prys, Rhisierdyn, Gutto'r Glynn, Meredydd ap Rhys, Rhys Goch Glyndyfrdwy, Siôn Brwynog, Thomas Celli, Llywelyn Goch ap Meuryg Hen, Rhys Cain 'o Groes Oswallt', Rhisiart Philip, Rhys Llwyd ap Rhys ap Rhiccart, Hywel ap Syr Mathew, Gruff. Hiraethog, Edmund Prys, Arch[d]diacon Meirionydd, Gruffudd Hafren, Rowland Fychan 'o Gaer Gai', Ieuan Llwyd Sieffre, Ieuan Tew Brydydd, Owain ap Llywelyn Moel, Lewys Môn, Dafydd Pennant, Rhys Goch ap Dafydd sef Rhys Goch Eryri, Tudur Aled, Ieuan Brydydd Hir, Siôn Philip, Lewis ab Edward Bencerdd, Wiliam Cynwal, Ieuan Deulwyn, Gruffudd ap Gweflyn, Lewys Menai, Dafydd Llwyd 'o Fathafarn', Dafydd ap Hywel, Ieuan ap Gruffudd Leiaf, Huw Arwystli, Rhys ap Llywelyn ap Gruffudd ap Rhys, Guttyn Owain, Hywel Dafydd ap Ieuan ap Rhys, Iolo Goch, Ieuan Llawdden, Wiliam Llyn, Gruffudd Gryg, Dafydd Llwyd ab Einion Lyglyw (or Gruffydd Llwyd ab Dafydd ab Einion Lygliw, or Dafydd ab Gruffydd Llwyd ab Einion Lygliw), Dafydd ab Gwilym, Lewys Morganwg (or Lewys Brydydd Hodnant), Rhisiart ap Rhys Llwyd, Iorwerth Fynglwyd, Thomas Derllysg, Dafydd, Abad diweddaf Margam, Siôn y Cent, Thomas Lleison 'o Gastell Nedd', Ieuan Du'r Bilwg, Llywelyn Moel y Pantri, Rhys Llwyd ab Rhys ab Rhisiart 'o Lan Haran', Ieuan Rudd, Gruffudd ap Ieuan ap Llywelyn Fychan 'o Lannerch Llyweni', Meredydd ap Rhosser, Tudur Penllyn, Dafydd ap Edmwnd, Ieuan Brechfa, Syr Owain ap Gwilym, Bedo Hafes, Syr Rhys o Garno, Dafydd Llwyd ab Llewelyn ab Gruffydd, Llywelyn ab Guttyn, Trahaiarn Brydydd Mawr, ? Iorwerth Beli, Llywelyn Goch y Dant, Wiliam Pywel 'o Gastell Madog', Dafydd y Coed, Ieuan Môn Hen, Gruffudd ab Gronw Gethin, Meyrig Dafydd, Wiliam Byrcinsha, Syr Dafydd Trefor, Bleddyn Siôn 'o Lancarfan', Casnodyn, Syr Rhys Offeiriad, Llywelyn ap Guttyn, Ieuan Gethin ab Ieuan ab Lleison, Syr Dafydd Jones, Ficcer Llanfair Dyffryn Clwyd, Ifan Llwyd, and Siôn ap Ffelpot. There are occasional notes on the poems and poets and on the source of the transcript.

A transcript by William Jones ('Bleddyn'), Llangollen of 'cywyddau' and 'englynion', etc. by Gwerful Mechain, Hywel Dafi [Hywel ap Dafydd ab Ieuan ap Rhys], Sion ap Philpot, Robert ap Dafydd Llwyd, Gruffudd Leiaf, Iorwerth Fynglwyd, Dafydd Llwyd ap Llywelyn ap Gruffudd, Sion ap Hywel ap Tudur, Huw Cae Llwyd, Lewis Daron, Bedo Brwynllys, Syr Rhys o Gar[no], 'Twm o'r Nant' [Thomas Edwards], 'Person Llangwm', Tudur Aled, Morys ap Hywel ap Tudur, Gruffudd Hiraethog, Huw Llwyd Cynfal, Ieuan Dew Brydydd, Dafydd ap Gwilym, Richard Cynwal, Huw Machno, Syr John [Sion] Leiaf, [Sir] Huw Pennant, Rhys Nanmor, Sion Dafydd Lâs [John Davies], Syr Dafydd Owain, Gruffudd ab Ieuan ap Llywelyn Fychan, Hywel Cilan, Sion Tudur, Lewis Môn, Hywel Gethin, Ieuan ap Gruffudd Leiaf, Watcyn ap Rhisiart, Hywel ap Rheinallt, Mathew Brwmffild, Guto'r Glyn, Watcyn Clywedog, Wiliam Llŷn, Wiliam Cynwal, Simwnt Fychan, Ieuan Llafar, Thomas Prys, William Vaughan, Huw Arwystli, Sion Phylip, Richard Phylip, Ieuan Dyfi, Lewis Menai, Rhys Goch Glyndyfrdwy, Llywelyn ap Gutun, Madog Leiaf and Ieuan ap Rhydderch, with 'englynion' by Dafydd Nanmor, Cadwaladr Ces[ai]l, Huw Ifan ap Huw ('o'r Brynbychan') and Siôn Ifan.

An imperfect manuscript containing a 'cywydd' by Thomas Pr[ys] ('o blas Siolun' [i.e. Iolyn]); anonymous 'englynion'; 'Llyma Lyfr a ddowaid am y lle a elwir monachlog yr yspryd Glan ...'; 'Dyma ystori o waith nikodemws' (fragment); 'carolau', with additions and emendations, by Rhys Jones ('Person Doged'), Elizabeth ach Williams [sic] Williams, Edwart Rowland, Hugh Morice, and Morus Rhobert, and anonymous 'carolau'.

Holograph copies and transcripts of Welsh verse in strict and free metre, including poems in strict metre entitled 'Cywydd marwnaed er Coffadwrieth am . . . Richard Owen, esqr., o Benierth, y rhwn a madawodd ar Byd . . . 1714', by Richard Edwards (y prydydd), 'Cywydd marwnaed Mr. Francis Williams ai Wraig, Mrs. Jane Williams, of [sic] Penierth ucha . . .' (1732 ), also by Richard Edwards (bardd ag athraw ysgol), 'Marwnad y parchedig Mr. Wiliam Wynn, Person Llan Gynhafal . . . a Manafon . . .', by Evan Evans, 'Cowydd Galarnad am Ynys Minorca a Phorthladd St. Philips, yr Hon a Gollwyd trwy ffalster a Llwfrdra A . . .l B . . . g', by Hugh Hughes, 'Cywydd Marwnad y parchedig Mr. Wiliam Wynn, Person Llann Gynhafal a Mynafon', by Rice Jones, 'Cywydd Marwnad Mrs. Sydney Fychan, Gwraig Howel Fychan o'r Hengwrt, Esqr., 1750', also by Rice Jones, 'Kowydd dau wr soredig wrth i gilidd o achos Merch', by Thomas Price (Plas Iolyn), 'Kowydd trafferth y byd ar Gyfraith', also by Thomas Prys, 'Cywydd Marwnad it parchedica Mr. John Nannau o faes y pandu', by Dafydd William, 'Cowydd Marwnad I William Wynn o Faes-y-neuoedd, Esqr., a ymadawodd a ni A[nn]o 1730', by Er. Will[ia]ms, 'Cowydd Marnad Mer. Robert Wynne', 'Englynion i Edward Sawdwr . . .,' by R. J., 'Englynion i annerch Edwart Hudol . . .' by Rice Jones, 'Englynnion er Coffadwrieth I Naid Mr. Hugh Pugh o Risie'r Mysseum ir Colofn gerllaw', by Mer. Lloyd, and 'Englynion'r Eos'; free- metre poems entitled 'Ychydig o ddiolch o waith William Davies i Mr. Wynn o fays yneyoedd, Dros gerdd ddorion Sir feirionydd' (1759) 'Carol y Scuthen', by Moris Lloyd, 'Cerdd o glod i Mr. William Weeinn o faes y neiodd i ofin hen wasgod' (1757), by Morris Parry, 'Carol Siani', by Phylip Richiard, 'Hanes Gwr Ifangc oedd mewn blinder achos Cariad . . .', ‘'Penhillion o foliant i Gras', 'Rhybydd ne Hanes Carwriaith drwstan dyn Ifangc', and 'Can i'r Gwydde . . .'; and other anonymous, miscellaneous compositions.

A composite volume ettered on the spine 'M.S.S. Vol. VI' containing miscellaneous material, chiefly in the hand of William Owen [-Pughe]. Pages 283-98 are in the hand of John Davies, Pentrefidog, and a note by him on p. 298 reads: 'Mae yn ddrwg ginni na allaswn ei wneuthur yn well yr wyf wedi mynd yn rhy garnbwl wedi gadel y 90. o oedran J:D.'. The contents include: pp. 1-6, 'The Laws of Menu. Memorandums'; p. 30, a brief word- list; pp. 45-96, a bardic grammar with examples of the twenty-four metres of Welsh poetry, beginning: 'Sillafeu a derfynant mewn dwy neu dair or bogeild . . . .', the text is preceded by a note: 'gwell [sic] y dechreu yn y Llyfr glas, Dwned S.Vn.'; p. 97, lines entitled 'To Beli', beginning: 'Mi rythiolaf buddig Beli . . .', with translation; pp. 99-101, 'Y Breiniau a roes Rhun i Wyr Arfon'; pp. 141-44, a list of the terms of rhetoric with Welsh equivalents; pp. 145-49, 'William Salbury yn danfon annerch ar Gruffudd Hiraethawc ag ar eraill of gelfyddyt, ex Autographo Salesburiano script 1552' (text published, see Henry Lewis: 'Llythyr William Salesbury at Ruffudd Hiraethog', The Bulletin of the Board of Celtic Studies, vol. II, pp. 113-18); p. 181, a note in shorthand and Hebrew; pp. 184-90, 197- 99, and 202-03, notes in shorthand; pp. 211-12, a shorthand-Hebrew vocabulary; pp. 213-14, a poem attributed to 'Gwyldrem Tarianmaon', beginning: 'Tan fyg Lywodraeth, Dewr Ymmerodraeth, Ynys Prydyn . . .'; pp. 215-17 & 222, an elegy to 'Robin Ddu o Fôn' [Robert Hughes], beginning: 'Cloed awdur gwaith clodadwy . . .'; pp. 225-28, a Welsh translation of the first two scenes of William Shakespeare's play Macbeth; p. 233, key to shorthand symbols; pp. 237-68, pages of shorthand; pp. 281- 82, 'Odlig newydd', seven stanzas beginning: 'Ar bethau o dragwyddol bwys . . .'; pp. 283-84, & 297-98, 'Cywydd yn dang[os] mor bur yw Cydymaith ag mor ffals yw un arall. o waith Thomas Price o blas yolyn', beginning 'Mae Bruson gyfion gyfion [sic] oedd gall . . .'; pp. 285-97, 'Hanes Merddyn ap Morfran', beginning: 'Y mae Prosess rhai or Awduron yn dangos fod gwr o fewn y wlad a elwir Nant Conwy . . .' and ending 'na gwr o drugiain mlwydd ar yr Awr hon'; p. 298, two 'englynion' by J:D. [John Davies, Pentrefidog], describing his handwriting in old age, beginning: 'Y llaw anhylaw yn hwylio/'r pinn . . .'; pp. 299 & 314, a note on the definition of God; pp. 300-342, notes on grammar and the parts of speech; p. 345, lines beginning : 'Hence Darkness! Light thy ancient seat regain . . .'; pp. 347 & 350, a list of place-names; and pp. 355-58 a note relating to Joanna [Southcott], dated 1803, and a passage concerning the second coming of the Lord Jesus Christ.

A volume of 'englynion' and a few 'cywydd' couplets in the hand of David Jones, Trefriw ('Dewi Fardd a 'sgrifenodd y Mydrlyfr hwn'). Among the poets represented are Lewis alias Llewelyn Glyn Cothi (1450), David Jones ('o Drefriw'), Sion Tudur, Edward Morris (1688), Alis ych Ruffydd, Ambrose Burchinshaw, Edward Evans, Robt. Llwyd, Dafydd Nanmor, D[afydd] ap Edmund, Evan Tho[mas] ('or Nilig'), Hugh Morris ('ynghastell y Waun'), Gr. ap Ieu. ap Lln. fychan, Ieuan Brydydd Hir, Huw ap Ifan ap Robt., Sion ap Robert ('o Juwch Aled'), Richard Hughes ('or Henfryn'), D[afydd] ap G[wilym], Tho. Prys, J. D., Richd. Davies ('Esgob Dewi', 1561), Sr. John Trefor, Edm. Prys, Sion Phylip, Richd. Phylip, Sion Clywedog, John Evan (1649), Sr. Dai. Llwyd ['Deio Ysgolhaig'], Sr. Ifan, Morris Dwyfech, Howell ap Matthew (1588), Moris Pari, Lewis Lleyn, Inco Brydydd, Rowland Wynne, Watcin Clowedog, Robin Ragad, Roger Cyffin, R[obin] Ddu, John Evans ('or Ysgwyddfrith'), Hugh Jones ('o Gaer Drudion', 1744/5), John Ridd[erch], Owen Griffydd, Sr. Rys, Richd. Thomas (Pen machno), Morris Roberts, Harry Howel, Sion Cain, Ieuan Llwyd Tudur, Sion ap Edward Grythor, Tho. Evans, Rissiard Cynwal, Tho. ap Ifan, Huw Machno, Gryffydd Phylip, John Thomas, Howel ap Sion Evan (1627), John Roberts ('Book binder', 1722), Tho. Morris ('or Ddôl'), John Richard, Rowland Fychan, John Prichard, Matthew Owen, Wiliam Phylib, Robert Wynn, Elsbeth Evans ('o Ruddlan'), Wm. Cad[wala]dr ('Clochydd Caer y Drudion'), John Edwards, Richd. Morris ('y Telyniwr'), etc. A few Latin 'englynion' have been included in the margins, as well as an ' englyn' by J. Williams, 1801.

A manuscript in two volumes containing a corpus of Welsh strict-metre verse consisting almost entirely of 'cywyddau', and a few Welsh prose items. The foliation of the 'text' (original f. 1 missing, original ff. 2-21 renumbered 1-20, a previously unnumbered folio between original ff. 21-2 now f. 21, ff. 22-623 as originally numbered with 75 twice and 265 and 577 missed out) is continuous, and the division into vol. I (ff. 1-300), now NLW MS 13061B, and vol. II (ff. 301-623), now NLW MS 13062B, occurs in the middle of a poem. Unnumbered leaves of later origin than those of the text have been inserted at the beginning and end of each volume. The manuscript, sometimes referred to as 'Y Byrdew Mawr', is in the hand of Thomas ab Ieuan of Tre'r-bryn, parish of Coychurch, co. Glamorgan, the scribe of NLW MSS 13063B, 13069B, and 13085B, and was probably transcribed in the last quarter of the seventeenth century, partly from the manuscripts of an earlier Glamorgan copyist, Llywelyn Siôn (see TLLM, tt. 95, 167-73, 218-19, 268; IM, tt. 87, 154, 264; and IMCY, tt. 81, 175). It was probably presented to Edward Williams ('Iolo Morganwg') by the copyist's grandson also named Thomas ab Ifan (see TLLM, tt. 170, 268). The contents include (revised foliation) :- 1 recto - verso, rules re interpreting the significance of dreams in relation to the phases of the moon (incomplete); 1 verso-8 recto, another set of rules (183) for interpreting dreams ('Deall braiddwydon herwydd Daniel broffwyd'); 8 recto-11 recto, a sequence of forty-eight 'englynion' entitled 'Englynion rhwng Arthur a Liflod i nai' (see The Bulletin of the Board of Celtic Studies, vol. II, pp. 269-86); 11 recto-verso, a poem attributed to 'Taliesin ben bayrdd'; 12 recto-15 verso, prognostications including 'Arwyddion kyn dydd brawd', and four 'englynion'; 16 recto-21 recto, 'Llyma anian diwarnodav y vlwyddyn o gwbl oll'; 21 verso, prognostications re birthdays; and 22 recto-623 verso, poems ('cywyddau' unless otherwise indicated) by Iorwerth Vynglwyd (17), Ieuan Rydd, Tydur Aled (12), Howel ap Rainallt (3), Mathav ap Lle'n Goch, Lewys y Glynn (7), Davydd ap Edmwnt (5), Siôn y kent (24), Davydd llwyd (2), Risiart Iorwerth (4), Llawdden (or Ieuan Llawdden) (6), Davydd Nanmor (5), Iolo Goch (8), Ieuan Daelwyn (13), Lewys Morgannwg ( 18), Thomas Lle'n (5, also 1 'englyn'), Howel ap Davydd ap Ieuan ap Rys (17), Ieuan Tew Bry[dy]dd Ievank (3), Huw Kae Llwyd (8), Ieuan Dyvi (2), Ieuan ap Howel Swrdwal (2), Davydd Llwyd Lle'n ap Gr' (3), Risiart ap Rys Brydydd (3), Tomos Derllysg (4), Gyttyn Kairiog, Ieuan Llwyd ap Gwilym, Ieuan Rydderch ap Ieuan Llwyd (3), Robert Laia, Ieuan Du Bowen Lle'nn ap Howel ap Ieuan ap Gronw (7), Rys Goch 'o Vochgarn', Ieuan Brydydd Hir, Gytto'r Glynn (25), Maredydd Brydydd, Howel Swrdwal (3), Thomas Lle'n Dio Powell (2), William Kynwal, Siôn Tydyr (7), Hyw Davi 'o Wynedd' (3), Huw Davi, Tomas ap Siôn Kati (2), Syr Rys 'o Garno', Syr Lewys Maudw, Syr Phylip Emlyn (2), Huw Lewis, Davydd Ddu Hiraddug, Davydd ap Gwilym (10), Bedo Aurddrem, Morys ap Howel, Ieuan Tew Brydydd (9), Siôn Brwynog, Harri ap Rys ap Gwilym (3), Morys ap Rys, Davydd Benwyn (11), Rydderch Siôn Lle' nn, Sils ap Siôn (3), Lle'n ap Owain, Syr Huw Robert L'en (3), Davydd ap Rys, Thomas Gryffydd, Siôn Phylip, Gwyrfyl verch Howel Vychan, Morgan ap Howel (or Powel) (4), Lle'n Siôn (8), Gryffydd Gryg (5), Maredydd ap Rys, Tydur Penllyn (2), Gronw Wiliam, Bedo Phylip Bach (4), Siôn Mowddwy (11), Rogier Kyffin (4), Wiliam Gryffydd ap Siôn (2), Hyw Dwnn, Lewys Môn (5), Wiliam Egwad (2), Ieuan Du'r Bilwg (2), Rys Brydydd, Daio ap Ieuan Du or Daio Du o Benn Adainiol (3), Gwilim Tew Brydydd (10), Rys Brychan, Maredydd ap Roser, Daio Lliwiel, Lle'nn Goch y Dant, Gryffydd Davydd Ychan (2), Syr Gryffydd Vychan, Lang Lewys, Rys Llwyd Brydydd, Meistr Harri Le'n ( 2), Siôn ap Howel Gwyn (2), William Llvn (5), Ieuan Gethin (ap Ieuan ap Llaison) (3), Gwilim ap Ieuan Hen, Ieuan ap Hyw, Gryffydd Hiraethog (5), Rys Pennarth, Davydd Llwyd Mathav (4), Davydd Emlyn, Davydd Goch Brydydd 'o Vyellt' (2), Rys Nanmor (3), Risiart Vynglwyd (2), Watkin Powel (6), Mairig Davydd (4), Ieuan Rauadr, Owain Gwynedd, Morgan Elfel, Syr Davydd Llwyd (3), Ieuan Thomas (4), Rys Goch 'o Eryri' (3), Lle'n vab Moel y Pantri (2), Syr Davydd ap Phylip Rys, Rys Trem, Siankin y ddyfynog (3), Morys ap Lle'nn, Risiart Thomas, Lle'nn Mairig, Gryffydd Llwyd ap Davydd ap Einon, Gryffydd Llwyd ap Einon Lygliw, Hopgin Thom Phylip, Edward Davydd (4), Ieuan Du Davydd ap Owain, Bedo Brwynllys, Thomas ap Rys 'o Blas Iolyn', Thomas Wiliam Howel, Davydd ap Ieuan Ddu, Syr Owain ap Gwilym, Rys ap Harri 'o Euas' (2), Edwart ap Rys, Davydd Manuel 'o Sir Drefaldwyn', SiamsThomas, Thomas Brwynllys, and Swrdwal. The unnumbered folios at the beginning of each volume contain a list of the contents of the volume giving, in the case of the poems, the name of the poet, in a hand bearing a strong resemblance to that of William Owen Pughe, and the title of the poem, in the hand of Edward Williams. The folios at the end of the first volume contain an index of the bards whose works appear in both volumes. This is possibly in the hand of Hugh Maurice, tanner and copyist. On one of the added folios at the end of the second volume is a poem to the Reverend John Jones, D.D., dean of [the cathedral church of] Bangor. Both volumes contain marginalia in the hand of Edward Williams.

'Cywyddau', 'englynion', etc., by Richard Cynwal, Huw Machno, Simwnt Fychan, Thomas ab Ieuan, Watcyn Clywedog, Evan Chweliriog, Rhees bwlch y llech, Sion Tudur, Guto'r Glyn, Gutun Owain, Tudur Aled, Morys ap Hywel ap Tudur, John Kynvric, Iolo Goch, Syr Dafydd Trefor, Wiliam Ll?n, Rhys Goch Glyndyfrdwy, Wiliam Cynwal, Gruffudd Hiraethog, Morys ab Ieuan ab Einion, Sion Phylip, Maredudd ap Rhys, Edwart ap Rhys, Dafydd ap Gwilym, Ieuan Dew Brydydd, Mastr Harri 'offeiriad', Dafydd ab Edmwnd, Gruffudd ab Ieuan ap Llywelyn Fychan, Llawdden, Ieuan Deulwyn, Hywel Rheinallt, Bedo Aeddren, Guttyn bach or park, Huw ap Richard ap Dafydd, Dafydd Nanmor, Hywel ap Iolyn, Morys Kyffin, Lewis Glyn Cothi, Robin Clidro, Robert ap Dafydd 'or pumrhyd', Sion Cent, Syr Rhys 'offeiriad', Sion Ceri, Dafydd Llwyd ap Llywelyn ap Gruffudd, Llywelyn ap Gutun, Wiliam Byrchinsha, Robert Dai Llwyd, Dafydd lloid ap William als david lloyd, Wiliam Myddelton, Owen Meurig, Thomas Prys, Edmwnd Prys, Huw Lloyd Cynfal, John Price ('or llwyndu'), Harri Hywel, and Humphrey Thomas; recipes; genealogies; etc.

A composite volume containing transcripts of miscellaneous Welsh poems, some incomplete, in free and strict metre. The original, brown, paper cover is inscribed 'Amryw Gerddi, Cywyddau, Awdlau, &c., o waith y Beirdd. Date 1766', and the contents include free-metre verse ('cerddi', etc.) by 'Brys Bras Brwnt', Robert Williams, Robert Roberts, Dafydd y prydydd Hir (o Lan fair Talhauarn), Maurice ab Robert, Evan Ellis, John Cadwaladr, Hugh Jones (Llangwm), Rouland Jones (? of Pandy, Llanuwchllyn), Rees Jones, and Thomas Edwards; 'cywyddau' by Rice Jones, Edwart Rouland, Griffith Philip, Thomas Prys, Lewis Morice, Richard Phylip, Hugh Lloyd Cynfel, 'Y Cardwr Du', Dafydd ab Gwilim, Siôn Tyddur, Ellis Rowland, John Dafis, Morys Dwyferch (sic), and Richard Edwards; and 'englynion' by Hugh Jones (o Langwm).

A commonplace book of prose and verse, including a fragment on husbandry, recipes, a charm, astronomical and tide tables, 'Ystori Peilatvs', 'Ystori Adda', 'Ystori Noe Hen', 'Ystori Suddas', 'Araith Gwgan', an extract from Y Ffydd Ddi-ffvant, interpretations of dreams, a calendar for 1695, and poetry by Aneirin Gwawdrydd (fl. second half 6 cent.), Taliesin (fl. end 6 cent.), Hywel Cilan (fl. c. end 15 cent.), Sion Cent (c. 1400-15 cent.), Dafydd Nanmor (fl. 15 cent.), Dafydd ab Edmwnd (fl. 1450-1490), Dafydd ap Gwilym (fl. 1315/20-1350/70), Iolo Goch (c. 1320-1398), Morys ap Hywel (fl. c. 1530), Gruffudd ab Ieuan (c. 1485-1553), Sion Brwynog (d. ?1567), Sion Tudur (c. 1522-1602), Huw Morys (1622-1709), Dafydd ap Rhys (fl. c. 1550), Lewys Morganwg (fl. 1520-1565), Robert Leiaf, Guto'r Glyn (c. 1435-c. 1493), Gruffudd Gryg (fl. 1357-1370), Maredudd ap Rhys (fl. 1440-1483), Tudur Aled (c. 1465-c. 1525), Gruffudd ap Dafydd ap Hywel (fl. 1480-1520), Syr Dafydd, Rhys Cain (d. 1614), Gruffudd Llwyd ab Einion (fl. c. 1380-1410), Wiliam ap Sion ap Dafydd, and Thomas Prys (1564?-1634). Some 'englynion' and memoranda have been written in the margins by Evan Thomas, Cwmhwylfod (d. 1781).

'Cywyddau', 'englynion' and 'cerddi' by Rhys Cain, Edwart Urien, Dafydd Manuel, Sion Tudur, Richard Davies, Lewis Glyn Cothi, Sion ap Hywel ap Llywelyn Fychan, Sion Mowddwy, Richard Phylip, Mathew Brwmffild, Rhys Goch Eryri, Thomas Brywnllys, William Pugh, Kleient, Rhys ab Ednyfed, Robert Dyfi, Deio ab Ieuan Du, Dafydd Nanmor, Robin Clidro, Thomas Prys, Wiliam ap Sion ap Dafydd, Ieuan Dew Brydydd, Mastr Harri, Gwerful Mechain, Griffith Owen, Rowland Vaughan, John Owen, John Thomas, Richard Owen, and Guto'r Glyn.

Transcripts by Ioan Pedr from manuscripts of Robert Jones (Tydu, Cwmglanllafar) and John Jones ('Myrddin Fardd') of 'cerddi' and 'cywyddau' by David Jones ('Dafydd Sion Siams'), Elis Roberts, Thomas Edwards ('Twm o'r Nant'), Hugh Jones (Llangwm), John Thomas (Pentrefoelas), Rice Hughes ('o Ddinam'), Owen Gruffydd, Robin Ddu, Dafydd Gorlech, John Roger, Mor[y]s ab Ieuan ab Einion, Thomas Prys, Gruffudd Hiraethog, Siôn Tudur, Guto'r Glyn, Llywelyn Goch ap Meurig Hen, Gruffudd Gryg and Dafydd ap Gwilym.

'Geirlyfr William Lleyn'; 'Bardhoniaeth ... William Middelton'; pedigrees and arms, mainly of North Wales families; 'cywyddau', 'awdlau', etc. by Adda Fras, Iolo Goch, Maredudd ap Rhys, Robin Ddu, Rhys Nanmor, Gwilym ab Ieuan Hen, Dafydd Gorlech, Tudur Aled, Gruffudd ab Ieuan ab Llywelyn Fychan, Wiliam Llŷn, Sion Cent, Sion Tudur, Thomas Prys, Lewis Menai, Gruffudd Phylip, Richard Cynwal, Edmwnd Prys, Wmffre Dafydd ab Ifan, Wiliam Phylip, Sion Bryncir, Siôn Phylip, Richard Phylip, Sion Dafydd Lâs [John Davies], Watcyn Clywedog, Mor[u]s Dwyfech [Morus ap Dafydd ab Ifan ab Einion], Huw Lewis, Dafydd ap Hwlcyn ap Madog, Rhisiart Brych, Dafydd Jones ('Ficer Llanfair-Dyffryn-Clwyd'), Owen Gruffydd, Sion Lleyn [John Roberts], Taliesin, Rhys Goch Eryri, Dafydd Llwyd ap Llywelyn ap Gruffudd, Sion Roger, Sypyn Cyfeiliog [Dafydd Bach ap Madog Wladaidd], Bedo Brwynllys, Mathew Owen, Edward Morus, Huw Mor[y]s, Ieuan Dew Brydydd, Huw ab Ifan, Robert Davies (Nantglyn), Robin ab Iorwerth, Rolant Huw (Graienyn), Dewi Wyn [o Eifion] [David Owen], Griffith William (Braichtalog), Goronwy Owen, John Thomas (Pentrefeidiog) [i.e. Pentrefoelas], M[organ] D[avies], Griffith Puw, Dafydd Jones ('Tailiwr'), William ab Edward ('o'r Bennar'), Thomas Edwards ['Twm o'r Nant'], Lewis Morris, Ieuan Llwyd [Brydydd], Rhys Llwyd [Pant-y-piod], Rolant [Rowland] Jones (Pandy) [Roli Penllyn], Hugh Jones (Llangwm), John Jones [Jac] (Glan y Gors) and W[illiam] Jones [Bardd Môn]; 'englynion' by several authors; material relating to persons and places in Merioneth.