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A seventeenth century transcript of 'cywyddau' and 'awdlau' by Huw Machno, Dafydd ap Gwilym, Sion Cent, Sion Tudur, Dafydd Nanmor, Iolo Goch, Tudur Penllyn, Guto'r Glyn, Tudur Aled, Ieuan Deulwyn, T[h]om[a]s Derllys, Robert Leiaf, Wiliam Llŷn, Sion Brwynog, Robin Ddu, Gruffudd Hiraethog, Lewis Daron, Owain Waed Da, Hywel Cilan, Dafydd ab Edmwnd, Rhys Goch Eryri, Sypyn Cyfeiliog, Lewis Glyn Cothi, Iorwerth Fynglwyd, Ieuan ap Tudur Penllyn, Lew[y]s Morganwg (Llywelyn ap Rhisiart), Deio ab Ieuan Du, Bedo Brwynllys, Wiliam Cynwal, Huw Arwystli, Mor[u]s Dwyfech (Morus ap Dafydd ab Ifan ab Einion), Bedo Phylip Bach, Sion Phylip, Maredudd ap Rhys, Lew[y]s Môn, Ieuan ap Gruffudd Leiaf, Richard Phylip, Rhys Goch Glyndyfrdwy, Ieuan ap Rhydderch ab Ieuan Llwyd, Gruffudd ab Ieuan ap Llywelyn Fychan, Dafydd Llwyd ap Llywelyn ap Gruffudd, Llywelyn ap Gutun [ap Ieuan Lydan], Sion ap Robert ap Rhys, Dafydd Benfras, Bleddyn Fardd, Edmwnd Prys, Gwilym ab Ieuan Hen, Syr Dafydd Trefor, Gruffudd Phylip, Ifan Llwyd (Gwaun Eingian), Edwart Ifans and Rhys ap Robert ap Hywel; 'englynion'; a vocabulary of old Welsh words; genealogies of the Lloyd family of Dulassau, etc.

'Cywyddau', 'awdlau' and carols by Huw Arwystli, Owain Gwynedd, Syr Owain ap Gwilym, Siôn Phylip, Ieuan Llwyd, Hywel Cilan, Edwart Urien, Lew[y]s Glyn Cothi, Rhys Cain, Dafydd ap Gwilym, Mathew Brwmffild, Ieuan Dew Brydydd, Dafydd Nanmor, Lewis Trefnant, Huw Machno, Sion Tudur, Guto'r Glyn, Sion Cain, Gruffudd Llwyd ap Dafydd ab Einion, Sion Mowddwy, Edmwnd Prys, Wiliam Llŷn, Richard [Rhisiart] Phylip, Sion Cent, Syr Phylip o Emlyn, Rhys ab Ednyfed, Iorwerth Fynglwyd, Syr Dafydd Trefor, Hywel ap Dafydd ab Ieuan ap Rhys, Tudur Penllyn, Deio ab Ieuan Du, Tudur Aled, Mastr Harri, Robin Ddu, Mor[u]s ab Ifan ab Einion, Edwart ap Rhys, Sion ap Rhys ap Llywelyn, Dafydd ab Edmwnd, Rhys ap Huw ab Ednyfed, Rhydderch ap Sion Llywelyn, Thomas Vaughan, William Vaughan, Sion Benddu, Gruffudd Gryg, Taliesin, Ieuan ap Hywel Swrdwal, Iolo Goch, Rhys ab Ednyfed and Bedo Hafesb; 'englynion', triads and recipes.

'Cywyddau' and other poems by Rhys Gray, Hywel Cilan, Huw ap Huw, Sion ap Hywel ap Llywelyn Fychan, Guto'r Glyn, Lewis Glyn Cothi, Dafydd ap Gwilym, Ieuan Dew Brydydd, Ieuan Brydydd Hir, Wiliam Llŷn, Iolo Goch, Gruffudd Gryg, Syr Dafydd Trefor, Dafydd Nanmor, Wiliam Cynwal, Lewis Menai, Sion Tudur, Tudur Penllyn, Gruffudd Hiraethog, Sion Brwynog, Dafydd ab Edmwnd, Lewis Môn, Llywelyn Moel y Pantri, Sion Dafydd Rhys, Hywel Rheinallt, Rhys Goch Eryri, Llywelyn Goch ap Meurig Hen, Ieuan Gethin ab Ieuan ap Lleision, Lewis Morganwg, Huw Llwyd Cynfal, Sion Phylip, Richard Phylip, Tudur Aled, John Davies, Owain Gwynedd and Sion Cent.

A volume containing a transcript by William Jones ('Bleddyn'), Llangollen of 'cywyddau', etc. by Edward Morus, Dr Gruffudd Roberts (Milan), Dafydd Nanmor, Dafydd ab Edmwnd, Wiliam Llŷn, Rhys Cain, Iolo Goch, Robin Ddu, Sion Brwynog, Dafydd ab Ieuan ab Owain, Cadwaladr Cesel, Ieuan Môn, Guto'r Glyn, Gruffudd ap Llywelyn Fychan, Syr Dafydd Trefor, Ieuan ap Madog ap Dafydd and Gruffudd Llwyd ap Dafydd ab Einion [Llygliw].

Transcripts, mainly by Rhys Jones o'r Blaenau, editor of Gorchestion Beirdd Cymru (Amwythig, 1773), of 'cywyddau' and other poetry by William Llŷn, Rhys Goch Glyndyfrdwy, Tudur Aled, Edward Morus [Perthi-llwydion], Gruffudd Hiraethog, Gruffudd ab Ieuan ap Llywelyn Fychan, Gruffudd Gr[y]g, Dafydd ab Edmwnd, Lewis Daron, Lewis Menai, Sion Tudur, Goronwy Owen, Sion Dafydd Lâs, Thomas Prys, Huw Mor[y]s, Dafydd ap Gwilym, Dafydd Nanmor, Mor[u]s Dwyfech [Morus ap Dafydd ab Ifan ab Einion], Rhys Cain, Bedo Brwynllys, Bedo Aeddren, Ieuan Deulwyn, Gruffudd Llwyd ap Dafydd ab Einion, Edwart Urien, Sion Cain, Ieuan Dew Brydydd, Lewis Glyn Cothi, Lewis Trefnant, Maredudd ap Rhys, Tudur Penllyn, Ieuan ap Hywel Swrdwal, Llawdden, Owain Gwynedd, Sion Ceri, Syr Ifan [o Garno], Robin Ddu, Hywel [ap] Rheinallt, Gutun Owain, Guto'r Glyn, Huw Arwystli, Dafydd Ddu Hiraddug [Dafydd Ddu Athro], Ieuan ap Tudur Penllyn, Iolo Goch, Sion Cent, Ieuan Brydydd Hir [Hynaf], Huw Llwyd Cynfal, Gruffudd Llwyd ab Ieuan, Richard Cynwal, Huw Machno, Robert Dyfi, Iorwerth Fynglwyd, Syr Rhys o Garno, Hywel ap Dafydd ab Ieuan ap Rhys, Richard Phylip, Evan Evans ('Ieuan Brydydd Hir'), Ieuan Du'r Bilwg, Aneirin Gwawdrydd, Taliesin, Morys ab Ieuan ab Einion, Deio ab Ieuan Du, Rhys Pennardd, Meil[y]r Brydydd, Cynddelw [Brydydd Mawr], Thomas Jones (Tregaron) ['Twm Sion Cati'], Wiliam Cynwal, Llywarch Hen, Bedo Hafesp, Huw Pennant, Edward Richard (Ystradmeurig) and David Richards ('Dafydd Ionawr').

A composite volume containing transcripts by Edward Williams ('Iolo Morganwg') of Welsh verse in free and strict metres. P. i is inscribed 'Hen Awdlau, Caniadau, a Phennillion amrafaelion eu rhywieu er dangos amrywiold[eb] Mesurau a mydrau Cerdd Dafod Beirdd Cymru mewn oesoedd Amrafaelion a'r amrafaelion newydiadau . . . ym mhrydyddiaeth Beirdd Cymru o amser beugilydd. Cynnulliad o Hen Lyfrau Ysgrif amrafaelion gan Iolo Morganwg . . .', and this may refer to the contents of pp. 1-142 which include transcripts of poems by, or attributed to, Dafydd Llwyd Matthew, Wiliam Llyn, Bedo Brwynllys, Siôn Ceri, Wiliam Egwad, Gwilym ap Ieuan hen, Dafydd Nanmor, Sippyn Cyfeiliog, Elidir Sais, Dafydd o Lynn Nedd, Einiawn Offeiriad, Ieuan Gethin ab Ieuan ab Lleison, Dafydd ap Edmwnd, Richard Cynwal, Taliesin, Rhys Cain, Llawdden, Gwilym Tew, Dafydd Benwyn, Lewys Morganwg, Gutto'r Glynn, Siôn Mowddwy, Siôn Bradford, Rhys Nanmor, and Guttyn Owain. Pp. 143-55 (previously 1-13) contain a transcript of the first part (279 lines) of Aneurin's 'Gododdin'; pp. 159- 90 (previously 1-32), transcripts of fifteen 'cywyddau' (No. 15 incomplete) by, or attributed to, Dafydd ap Gwilym; pp. 199-206 (previously 1-8), transcripts of poems by, or attributed to, Gruff. ap Maredydd ap Dafydd; pp. 225-72, transcripts of, or extracts from, poems by, or attributed to, Dafydd ap Edmund, Llowdden, Siôn ap Dafydd ap . . ., Syr Lewys y defaid, Syr Lewys Anwyl, Robt. ab Ifan, Richd. Dafies, Esgob Dewi, Dafydd Nanmor, Tudur Aled, Wm. Cynwal, Siôn Brwynog, Harri ap Thomas ap Wiliam o'r ddiserth, ? Gruff. Hiraethog, Siôn Tudur, Syr Lewys Gethin, Lewis ab Edward, Dr. Morgan, Esgob Llanelwy, Alis ferch Gruff., Cadwgan ffol, Rhys Cain, Gutto'r Glynn, Iolo Goch, Llywelyn ab Gruffudd, Llywarch Hen, ?Siôn Dafydd Nanmor, Ieuan Gethin ab Ieuan ab Lleison, Hugh bach ab Hywel ab Shenkin, William Llyn, Edd. Llwyd, 'ceidwad y Museum yn Rhydychen', Gwalchmai, Lewis Powel, William Midelton, Bleddyn Fardd, Meil. ab Gwalch., and Pryd. Moch, and a transcript of a prose item ['Araith y gwr moel o Sythia']; and pp. 281-92, transcripts of poems [from the 'Book of Taliesin']. P. 297 is inscribed 'Caniadydd Morganwg sef Casgl o Hen Garolau, Caniadau, a Chwndidau. Rhif 11', and is followed on pp. 301-36 by transcripts of fourteen 'cwndidau' by, or attributed to, Thomas ab Ieuan ab Rhys and one 'cwndid' by, or attributed to, Thomas ap Ieuan Madog. P. 341 is inscribed 'Cwndidau a Chaniadau Rhys Brydydd o Lyfr R. Bradford', and is followed on pp. 343-59 by transcripts of three poems (two 'cwndidau') by, or attributed to, the said poet. Intermingled with the poems are notes or anecdotes relating to the following poets and 'eisteddfodau' - pp. iv, 79, and 121, Gwilym Tew and 'eisteddfodau' at the monastery of Pen Rys in Glyn Rhondde and Caerfyrddin; vii, Lewis Glynn Cothi and Tudur Penllyn; 50, Einion Offeiriad; 60, Dafydd ap Edmwnd and an 'eisteddfod' at Caerfyrddin; 100 and 104-05, Lewys Morganwg and 'Eisteddfod y Penrhyn yn Arfon'; 109 and 235, Gutto'r Glynn; 114, Siôn Mowddwy; 235-6, Iolo Goch; 237, Llywarch Hen; 265, Tudur Aled; and 342, Meredydd Philip (alias Bedo Philip Bach), his brothers Thomas and William, and his nephew Hopcin Thomas Philip, William Dafydd, and Morgan Pywel. Pp. 115-18 contain transcripts of notes on the use of double rhyme ('cyfochri') in some Welsh strict poetic metres and on the vaticinatory element in Welsh verse. These notes are attributed to Siôn Bradford. Edward Williams ('Iolo Morganwg') has inserted comments on some of the poems in the volume.

A composite volume containing miscellaneous material in the hand of Edward Williams ('Iolo Morganwg'). The contents include p. 1, a copy of a proclamation announcing the holding of an 'eisteddfod' at Caerwys, co. Flint, in the year 1523; 2-26, extracts from, or versions of, the statutes for regulating the organisation and conduct of Welsh bards and musicians associated mainly with the name of Gruffudd ap Cynan; 26-35, a series of triads with the superscription 'Llymma Drioedd Gruffudd ap Dafydd Ychan'; 39-43, a copy of an 'Awdl perthynol i'r Rhyfel bresenol ag America' attributed to I[orwerth] ap G[wilym]; 49-60, transcripts of two Welsh poems attributed to Llywarch Brydydd y Moch and Cynddelw Brydydd, three 'englynion' from 'Llyfr Hir Llanharan', and an 'englyn' attributed to Siôn y Cent; 65-94, transcripts of miscellaneous Welsh verse including a series of twenty-two stanzas with the superscription 'Llyma'r Englynion a fu rhwng Trystan ab Tallwch a Gwalchmai ab Gwyar . . . ', 'Casbethau Arthur', stanzas from the 'Black Book of Carmarthen' attributed to Taliesin, a sequence of twenty-seven stanzas ('Gwasgargerdd Merddin yn ei Fedd') attributed to Myrddin ab Madawg Morfryn, a 'marwnad' attributed to Gruffydd Llygad gwr, a four-line 'darogan' attributed to Peredur Fardd, thirty stanzas from the 'Red Book of Hergest' entitled 'Ymatreg Llywelyn a Gwrnerth', forty-four stanzas with the superscription 'Tribanau yr Eiry Mynydd ar y mesur a elwir yr Hen Driban' attributed to Mab claf ab Llywarch or Llywarch Hen, and a further series of twenty stanzas with the superscription 'Llyma Englynion Eiry Mynydd eraill . . .' attributed to Ystyffan Bardd Teilo or Talhaiarn; 97-101, a list of the twenty-four traditional Welsh accomplishments ('Y Pedair Camp ar hugain'); 103-24, transcripts of 'cywyddau', etc., attributed to Bedo Philip Bach, Howel Dafydd ab Ieuan ab Rhys, Gr. Hiraethog, Siôn Mawddwy, Dafydd ap Gwilym, Trehaearn Brydydd Mawr, and Gutto'r Glynn, and of a series of 'englynion' to commemorate the year of accession of every English monarch during the period 1067-1558, these last being attributed to Berud ap yr Ynad Coch, Bleddyn Ddu, Cynddelw Brydydd Mawr, Llywelyn Fardd, Dafydd y Coed, Harri Haram Param, Llefot Wynebcolawr, Cyssymdaith Llefot Wynebcolawl, Mabwaith Hengrys o Ial, Llygad Gwr, Llywelyn ap Hywel Wrnerth, Gwilym Ddu 'o Arfon', Dafydd Bach ap Madoc Gwladaidd, Hywel Ystorun, Daniel Llosgwrn Marw, Dafydd Eppynt, Ieuan Brydydd Hir, Bleddyn ap Ieuan Hen, D. ddu, Ierwerth Fynglwyd, Rhys Nanmor, Hywel ap Bleddyn Mathew, Owain y Bardd 'o Wynedd', and Huw Arwystli; 129-35, a list of mainly Welsh authors who had written about the island of Britain ('am holl ynys Brydain') and of Welsh bards who had written of the three regions of Wales ('tair talaith Cymru'), etc.; 137, receipts for making ink; 138-9, transcripts of the Lord's Prayer in Welsh as versified by Dafydd Benwyn, and of 'englynion' attributed to Thos. Llen. 'o Regoes', Daf. o'r Nant, and Iolo Morganwg; 140-50, a transcript of a letter from Dafydd Tomas from Pandy'r Ystrad to Dafydd Rhys touching upon the course of the Reformation and the rise of Nonconformity in Glamorgan and mentioning Rhawlins White, Siôn Penri, William Erbri, and Walter Cradoc, and a translation of the Bible into Welsh by Tomas Llywelyn 'o Regoes' (the text of this letter was published in L. J. Hopkin James and T. C. Evans: Hen Gwndidau, Carolau, a Chywyddau . . . (Bangor, 1910), pp. 207-13; for doubts as to its authenticity and the opinion that it was composed by Edward Williams himself see TLLM, tt. 127, 245); 151-3, an anecdote relating to Gwilym Hir Saer and three stanzas in the 'triban' measure attributed to him; 154-64, two versions of 'Dengair Deddf y Beirdd' or 'Dengair Deddf Beirdd y Cymry' (published in James and Evans: op. cit., pp. 199-207); 165-74, a transcript of a letter from Dafydd Nicolas ? of Aberpergwm from Glyncorrwg to Edward Han of Aberdar, 1754, in which the writer gives his views on the relative merits of Welsh strict- and free- metre verse (the text of the letter was published in Taliesin . . ., cyf. I, 1859-60, tt. 92-5; for doubts as to its authenticity and an opinion that it was composed by Edward Williams himself see TLLM, tt. 241, 290-92); 175-6, a short chronicle of events in Welsh history, 1221-1419; 177-216, transcripts of Welsh poems attributed to Howel ab Owain Gwynedd, Casnodyn Fardd, ? Cynddelw, ? Teulu Owain Cyfeilyawc, Prydydd y Moch, Meilir Brydydd, Bleddyn Fardd, Llywelyn Fardd, Taliesin, Rhobin Ddu, Y Bergam o Faelor, Ieuan Trwch y Daran, D. ab Edmund, Ieuan Tew Hen, and Lln. ap Guttun, and miscellaneous extracts; 217, a copy of the prophecy of Friar Bacon ('Prophwydoliaeth y Brawd a elwid Ffreier Bacon'); (continued)

218-21, miscellanea including transcripts of two 'englynion' attributed to Sir Huw Dafydd and Thomas Powel, and a list of the cantrefi and cymydau of Morganwg 'ex Havod MS.'; 222-4, miscellaneous domestic and medicinal recipes; 243-5, a copy of a foreword reputedly written by Benjamin Simon in 1754 to a collection of the poems of Dafydd ap Gwilym; 246-52, transcripts of Welsh poems attributed to Ieuan Tew o Gydweli and Edward Llwyd; 253-5, a list of castles in Britain ('Caerau Ynys Prydain sef y Prif Gaerau'); 255-69, transcripts of miscellaneous 'englynion', three triads, and poems attributed to Siams ab Harri 'o Euas' and Gruffudd ap Ieuan ap Llywelyn Fychan; 270-87, transcripts of series of 'sayings', proverbs, triads, etc., with the superscriptions 'Saith gamp a ddylai fod ar wr', 'Saith ymofynion a'u hattebion', 'Geiriau Gwir Cattwg Ddoeth', 'Gorddodeu Cattwg ddoeth', 'Gorddodeu'r Hen Gattwg o Ial', 'Synnidau Cattwg Ddoeth', 'Trioedd amrafaelion', 'Diarhebion amrafaelion', 'Diarhebion Cenhedlig a Lleol', 'Llyma Ddiarhebion Tymmor a Thywydd', and 'Diarhebion Meddygol'; 287-95, a sequence of fifty-three stanzas entitled 'Englynion yr Eira Gwyn ar Ddiarhebion'; 296-323, transcripts of miscellaneous Welsh prose and verse items including prose items headed 'Llyma wyth llawenydd y Nef', 'Llyma Rinwedd y Ceiliog', 'Cas Betheu gan Dduw', 'Wyth o Drioedd', 'Naw Gradd yr Awgrym', 'Naw gradd Carrenydd', 'Llyma y pum achos sydd i gadw achau', 'Nodau Rhifyddiaeth yr Hen Gymry', 'y Llythyrenau Cymreig Hen a Newydd', 'Tri chynghor a roddes Iesu Grist iddei Ganlynwyr', 'Enwau Ynys Prydain a'i Rhag ynysoedd a'i chaerydd', and 'Hwedl Rhitta Gawr', 'englynion' attributed to Dafydd Benwyn 'o Forganwg', Edward Dafydd 'o Fargam', and Ieuan Gethin ab Ieuan ab Lleison, twenty-six stanzas attributed to Rhys Llwyd Brydydd 'o Lanharan', and verse attributed to Merddin Emrys, Taliesin, and Goronwy Owain; 324-438, transcripts of Welsh poems, mainly 'cywyddau', attributed to Iolo Goch, Gwilym ab Ieuan Hen, Rhys ab Cynfrig Goch, Dafydd ab Edmwnd, Iorwerth Fynglwyd, Thomas Llywelyn, Lewys Môn, Rhys Nanmor, Huw Cae Llwyd, Rhys Goch 'o'r Eryri', Siôn Philib, William Llyn, Rhisiart Fynglwyd, Rhys Llwyd ab Rhys ab Rhisiart, Meredydd ap Rhys, Ieuan Du'r Bilwg, Siôn y Cent, Ieuan Cae Llwyd, Tudur Aled, Syr Owain ab Gwilym, Owain Gwynedd, Taliesin, Dafydd Llwyd ab Llywelyn ab Gruffydd 'o Fathafarn', and Siôn Mowddwy; 439-42, transcripts of items with the superscriptions 'Gweddi Talhaearn . . .', 'Y Deuddeg Prif Gynnegolion . . .', 'Llyma Bennill Cadair Gorsedd Alban Arthan', 'Llyma Weddi'r Orsedd', and 'Cylch Byd a Bywyd', and examples of the strict metre known as 'gorchest y beirdd'; 459-95, transcripts of poems attributed to Dafydd ap Gwilym and some unattributed poems; 555-65, three sequences of stanzas (16, 13, and 8) with each verse commencing 'Coronog Faban' attributed to Aneurin Gwawdrydd or Gildas ap y Caw, Jonas Athraw Mynyw, and Rhys Goch 'o Eryri', with comments on the three series; 566, transcripts of four stanzas of Welsh strict-metre verse attributed to Rhys Llwyd and Iorwerth Fynglwyd; 571-86, a version of the statute relating to Welsh bards and musicians associated with the names of Gruffudd ab Cynan and Bleddyn ab Cynffyn; 587-9, notes relating to an 'eisteddfod' held by Rhys ab Gruffydd in Cardigan and rules formulated relating to the bards and 'eisteddfodau'; and 590-626, transcripts of miscellaneous Welsh prose and verse items including notes headed 'Llyma fal y dychre Dosparth ar Gelfyddyd cerdd dafawd yn Llyfr Iago ab Dewi', series of triads with the superscriptions 'Llyma Drioedd o hen Lyfr Tre'r Eos', 'Llyma Drioedd Gwilym hir, saer Hopkin ap Thomas ab Philip', and ['Trioedd] o Lyfr y Dr. Williams o Gaernarfon', Welsh poems attributed to Taliesin, Iorwerth Beh, Mabclaf ab Llywarch, and ? Daniel Llosgwrn Mynyw, a version of the bardic statute associated with the name of Gruffudd ap Cynan, prose items with the superscriptions 'Llyma Gasbetheu Doethion Rhufein', 'Dewisa Gwr nid amgen', 'Saith rhodd yr Yspryd Glan', 'Llyma Ddewisolion Dafydd Maelienydd', and 'Dewisolion Hywel Ystoryn', and an anecdote relating to Huw Llwyd Cynfel, brother of Morgan Llwyd 'o Wynedd'.

A transcript by William Jones ('Bleddyn'), Llangollen, formerly of Beddgelert, of 'cywyddau' and 'englynion' by Dafydd ap Gwilym, Iolo Goch, Dafydd ab Edmwnd, Tudur Aled, Guto'r Glyn, Tudur Penllyn, Syr Rhys o Garno, Sion Cent, Maredudd ap Rhys, Lewis Glyn Cothi, Llawdden, Robin Clidro, Sion Tudur, Wiliam Cynwal, Wiliam Llŷn, Edmwnd Prys, Simwnt Fychan, Sion Brwynog, Owain Gwynedd, Gruffudd ab Ieuan ap Llywelyn Fychan, Thomas Prys, Sion Prys ('o'r Gerddinen'), Edwart ap Raff, Rhys Ednyfed, Thomas Evans, Huw Arwystli, Watcyn Clywedog, Sion Dafydd Lâs [John Davies], Owen Gruffydd, Dafydd Gwyne, Dafydd Jones ('Ficer Llanfair Dyffryn Clwyd'), Gruffudd Hiraethog, Ieuan Deulwyn, Hywel ap Dafydd ab Ieuan ap Rhys, Inco Brydydd, Gruffudd Gryg, Ellis Rowland and Hywel ap Rheinallt; 'englynion'.

Poetry, mainly 'cywyddau' with a few 'awdlau' and 'englynion', by Sion Tudur, Thomas Prys 'o Blas Iolyn', Gruffudd Hiraethog, Morice ab Ieuan ab Eigian, Iolo Goch, Dafydd ap Gwilym, Gwerful Mechain, Ieuan Llwyd 'or Towynn', Guto'r Glyn, Llywelyn Goch ap Meurig Hen, Gruffudd Gryg, Rhys Pennardd, Richard Gruffydd ap Huw, Dengyn Kyfeiliog, Dafydd ab Edmwnd, Gruffydd Kenrick Coch, Edmwnd Prys, Owain Waed Da, Hywel Cilan, Iorwerth Fynglwyd, Hywel ap Llywelyn ap Moel y Pantri, Gruffudd ab Ieuan ap Llywelyn Fychan, Maredudd ap Rhys, Gruffudd ap Gronw Gethin, Tudur Aled, Gutun Owain, Deio ab Ieuan Du, Gruffudd Llwyd ap Dafydd ab Einion, Richard Gruffydd ap Huw, Robert Leiaf, Ieuan Dyfi, Wiliam Llyn, Sion Cent, Lewis Jones, John Price ('of N.M., 1635'), Huw Arwystli, Dafydd Nanmor, Rhys Nanmor, Rhys Goch Eryri, Syr Dafydd Owain, Raff ap Robert, Sion Phylip, Richard ap Hywel ap Dafydd ab Einion, and Lewis Mon. Among miscellaneous items in the manuscript is a copy of a letter by John Parry in which he mentions his cousin Thomas Lloyd of Nantglyn.

Copies of 'cywyddau' by Guto'r Glyn, Hywel Cilan, Edward ap Raff ('prydydd dall oedd ef, 1587'), Rhys Cain (1598), Sion Brwynog, William Llŷn, Hywel Gethin 'o Gelynog', Rhys Pennardd, Hywel Rheinallt, and Gruffudd Llwyd ab Ieuan; a carol dated 1598; an 'englyn'; music miscellanea ('y pedeir caing ar ddec', 'y pedeir gostec', 'Klymav'); and prose 'areithiau', 'Dewis-bethau Davydh Meilienydh', 'Breudhwyt Gruff. ap Adha ap D'd', and 'Breudhwyt Llewelyn Goch ap Meuric Hen'. The latter portion of the manuscript is in the hand of Thomas Williams, 'physycwr'.

A composite volume consisting of seven home-made booklets with stiff, brown paper covers bound together. The contents of six of the booklets consist of series of Welsh triads in the hand of Edward Williams ('Iolo Morganwg'), the various booklets containing the following series-Book I (pp. 11-62), ['Trioedd Doethineb'], 'Trioedd Gwladoldeb', 'Trioedd y Meddwyn', 'Trioedd Cyfarwyddyd', and 'Hen Drioedd Dosparth'; Book II (pp. 63-106; the inscriptions on the outer and inner upper cover appear to indicate that the contents were to consist of a series of 'Trioedd Braint a Defod', but the pages are blank except for p. 65 which contains two miscellaneous triads probably in the hand of Taliesin Williams); Book III (pp. 107-58), 'Trioedd Braint a Defod'; Book IV (pp. 159-206), 'Trioedd Doethineb', 'Hen Drioedd o Lyfr Thomas Glyn Cothi . . . Trioedd Taliesin in al.', 'Trioedd Serch' from the same source , 'Hen Drioedd Doethineb o Lyfr Watkin Giles', 'Trioedd Cyfarwyddyd', and 'Trioedd Barddas'; Book V (pp. 207-44), 'Trioedd y Dieithr', 'Hen Drioedd Cerdd Cymmysg sef Trioedd o Lyfr Iorwerth Fynglwyd . . .', 'Trioedd Llawdden Fardd a ddangos . . . efe yn Eisteddfod fawr Caerfyrddin' (on a strip of paper pasted on to p. 228), 'Trioedd Llaw[d]den Fardd sef Trioedd Cerdd Dafawd', and 'Trioedd Llawdden Fardd a ddangoswyd yn Eisteddfod Caerfyrddin 1451'; Book VI (pp. 245-84), 'Trioedd y Llafurwr o Lyfr Thomas Morys o Fodryngall yn Ystrad Dyfodwg a ysgrifennwyd ynghylch y flwyddyn 1700 gan Rhys Lewys, Meistr Ysgol yn Llanwonno . . .', and 'Trioedd Ach a Bonedd'; and Book VII (pp. 285-336), 'Trioedd y Brodyr o Lyfr Llywelyn Siôn' ('Rhisiart Iorwerth a'i Cant'), a second series with. the same title ('a Rhisart Iorwerth a gant y rhain hefyd'), 'Trioedd Mab y Crinwas o Lyfr Esaia Powel . . .' ('Gutto'r Glynn au Cant i'r Eisteddfod fawr ynghaerfyrddin'), 'Trioedd y Cymro o Lyfr Thos. Philip o Dreoes . . .' ('Hopcin Twm Philip o'r Gelli fid ai Cant'), 'Trioedd y Sais' from the same source, 'Trioedd y Lladron sef ydynt Brenin, Offeiriad, a Lleidr' from the same source, 'Trioedd Ysmalhawch Amrafaelion', 'Trioedd Beirdd', 'Trioedd Amrafaelion' (two series), 'Trioedd Cerdd Amrafaelion', and 'Trioedd Braint a Defawd'. Some of the series are incomplete and there are occasional annotations by Edward Williams and ? by Taliesin Williams, his son.

Pedigrees, mainly of North Wales families; a list of uncommon Welsh words taken from John Davies, Mallwyd: Dictionarium ... (London, 1632); a vocabulary of some 'hard' Latin words; 'cywyddau' and other poems by Rowland Williams, Rhys Meigen, Dafydd ap Gwilym, Rowland Vaughan, Siôn Cent, Dafydd ab Edmwnd, Wiliam Phylip, Owen Gruffydd, Edmwnd Prys, Robin Ddu, Siôn Phylip, Sion Tudur, Gruffudd Phylip, Maredudd ap Rhys, Gutun Owain, Iolo Goch, Morus Berwyn, Ffowc Prys, Owain Gwynedd, Roger [C]yffin, Siôn Brwynog, Syr Owain ap Gwilym, Wiliam Llŷn, Huw Arwystli, Richard Phylip, Dafydd Nanmor, [If]an Llwyd ('o wain Eingian'), Hywel Cilan, Edwart Urien, Lewis Glyn Cothi, Rhys Cain, Lewis Trefnant, Matthew Brwmffild, James Dwnn, Ieuan Dew Brydydd, Heilyn Fardd, Huw Machno, Guto'r Glyn, etc. ; a description of Britain based on the early chronicles; the triads of Dyfnwal Moelmud; etc.

A book into which Peter Bailey Williams of Llanrug copied Welsh poetry between 1799 and 1834. It contains 'englynion' by Thomas Anwyl, William Burkinshaw, Cadwaladr Cesail, Syr Rhys Cadwaladr, William Cynwal, Morus Dwyfech, Griffith Edwards [?'Gutyn Padarn'], Rowland Fychan, William Llŷn, Huw Morys, Richard [Rhisiart] Phylip, William Phylip, Edmwnd Prys, Dafydd Thomas, Morgan ap Rhys, Dafydd Llwyd o'r Henblas, Hywel ap Rheinallt, Huw ab Ifan, and others, and 'cywyddau' by Mathew Bromfield, Dafydd ap Maredudd ap Tudur, Dafydd Llwyd ab Llywelyn ap Gruffydd, Guto'r Glyn, Gruffydd Bodwrda, Hywel Dafi, Ieuan Deulwyn, John Griffith, Llanddyfnan, Llawdden, Owain ap Llywelyn Moel, Rhisiart Cynwal, Richard Hughes, Sypyn Cyfeiliog, Tudur Penllyn, and Griffith Williams ('Guttyn Peris'); a large collection of 'penillion telyn'; and a few charms and recipes.

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.

'Llyfr Gwyn Mechell, sef Casgliad o Ganiadau ... wedi ei ysgrifenu gan William Bulkeley, Yswain o'r Brynddu, Llanfechell yn Mon ...', containing 'cywyddau', etc. by Sion ap Hywel ap Llywelyn Fychan, Morys Dwyfech (Morus ap Dafydd ab Ifan ab Einion), Lewis Glyn Cothi, Syr Dafydd Trefor, Gruffudd Hiraethog, Hywel [ap] Rheinallt, Dafydd ap Gwilym, Sion Tudur, Tudur Aled, Ieuan Dew Brydydd, Dafydd ab Edmwnd, Rhydderch ap Richard, Huw ap Rhys Wyn, Ieuan ap Rhydderch ab Ieuan Llwyd, Lew[y]s Môn, Sypyn Cyfeiliog, Ieuan Deulwyn, Wiliam Llŷn, Sion Phylip, Maredudd ap Rhys, Huw Pennant, Gruffudd ap Dafydd ap Hywel, Rhisiart ap Hywel, Huw Arwystli, Dafydd Manuel, Gruffudd ab Ieuan ap Llywelyn Fychan, Edward Samuel, Wiliam Cynwal, Roger Cyffin, Huw Mor[y]s, Robert Wynn ('Ficcar Gwyddelwern'), John Roger, John Davies ('Sion Dafydd Las'), Rhisiart Brydydd Brith, Simwnt Fychan, Huw Llwyd ('o Gynfal'), Iorwerth Fynglwyd, Iolo Goch, Dafydd Llwyd ap Llywelyn ap Gruffudd, Guto'r Glyn, Bedo Phylip Bach, Deio ab Ieuan Du, Rhydderch ap Sion, Edwart ap Rhys, Syr Dafydd Llwyd, John Griffith (Llanddyfnan), Elen G[oo]dman, Rhisart Gray, Huw Humphreys ('Person Trefdraeth'), Rhisiart [Richard] Bulkeley, Owen Prichard Lewis, Dafydd ap Huw'r Gô ('o Fodedern'), Rhys Gray, Edward Morus, Sion Prys, John Williams ('o Bontygwyddel'), Dafydd Llwyd (Sybylltir), Lewis Meurig ('y Cyfreithiwr'), Peter Lewis, Roger Williams, Wiliam Peilyn, Richard Abram [Abraham], Huw [Hugh] Bulkeley ('o Lanfechell') and Ifan Jones ('o'r Berthddu'); together with extracts relating to State affairs in the reign of Charles I.

A composite manuscript volume lettered on the spine 'MSS. Collections Relative to Wales, II', being a companion volume to, and a continuation of, NLW MS 6209E, which is also a composite manuscript (sections numbered I-XIII) bound in a similar manner and lettered on the spine 'MSS. Collections Relative to Wales, I'. It appears that the two volumes originally formed one folio manuscript belonging to Edward Lhuyd made up of transcripts by his assistants, contributions by Henry Rowlands and Hugh Thomas, and fragments of earlier manuscripts (see pp. 14-15 of NLW MS 13918F, 'Catalogue of Welsh M.S.S. in Beechwood Library by the Reverend Mr John Jones [?1746-1827] M.A. Fellow of Jesus College Oxon, 1781', i.e. part of the Sebright collection. The contents include: pp. 1-38 (XIV), a copy of [George Owen's] 'Treatise of Lordshipps Marchers in Wales . . .' from a 'MS. Borrowed of Mr. Will. Jones, Rector of Lhangower. . .'; 39-100 + 207-08 (misplaced) (XV-XVI), transcripts of Welsh poems attributed to William Phylip, Ievan Ddu'r Bilwg, H'l ap D'dh ap Ievan ap Rhys, Howel Davi, Bedo Brwynllys, Gytto'r Glyn, Ievan Deulwyn, Rhys Lhwyd ap Rys ap Rhiccard, Lewis Glynn Kothi, Gwilym ab Ievan Hen, Davydd ap Howel, D'd Lhwyd ap Lle'n ap Gr., Ieuan ap Ho'll Swrdwal, Davydd Epynt, Lewys Môn, Edward Urien, Gyttyn Owain, Ierwerth Beli, Bleddyn Vardd, Llygat Gwr, Meilir Brydydd, Llywelyn ap Ho'll, Prydydd y Moch, Gwalchmai, Symwnt Vychan, Iolo Goch, Syppyn Kyfeiliog, Tudur Aled, Deio ab Ivan Ddu, Rhys Goch o'r Yri, Llywelyn Moel o'r Pantri, Ivan Tudyr Penllyn, Ievan Brydydd Hir and Tudyr Penllyn, and of prose items with the superscriptions 'Llythyr i ofyn Rhwyd berked', ['Y Tri Thlws ar Ddeg'], 'Dewis Bethau Howel Lygad Gwr', 'Y Pedwar Marchog ar Hugain oedd yn Llys Arthur', 'Ymadrodd yr Henwr', 'Breuddwyd Ivan ab Adda ab Davydd . . .', 'Breuddwyd Ierwerth ab Adda ab D'd', and 'Llythyr i ofyn palffon', partly from manuscripts in the possession of John Lloyd of Aber Llyveni; 101-40 (XVII), transcripts of Welsh prose and verse items, mainly vaticinatory, attributed to Taliessin, Robin Ddy, Gryffydh ap Ieuan, Rhys Nanmor, Merdhyn, Adha Vras, Hinin Vardh, Ie'nn Drwch y Daran, D'd Nanmor, and Davydh Lhwyd; 141-206 (XVIII), transcripts of Welsh verse and prose items, again mainly vaticinatory, attributed to Taliesin, Merdhyn Wylht, Iolo Goch, Davydh Llwyd, Merdhyn Emrys, Adha Vras, Ievan Trwch y Daran, Davydh Nanmor, Ie'nn Hir, Lh. ap Owen, Meredydh ap Rhys, Rhys Goch o'r Yri, Lewys Glynn Kothi, Raph ap Robert, and Bardh Bergam; 213-35 (XIX), genealogical and historical material including genealogies of Welsh saints , '. . . hiachau [sic] pump brenhin llwyth Kymru', '. . . Iachau [sic] pymthek llwyth Gwynedd', a list of the daughters of Ronow Llwyd ap y Penwyn', etc.; 239-54 (XX), a copy, 'transcrib'd from ye original at Owlberry near Bishops Castle, Anno 1698', of an inspeximus and confirmation, 4 March [?1508], of charters granted to the abbey of Strata Florida (see S. W. Williams: The Cistercian Abbey of Strata Florida (London, 1889), Appendix, pp. lxxiv-lxxv, and Calendar of Patent Rolls, Henry VII, vol. II, p. 567); 257-66 (XXI), transcripts of Welsh poems attributed to Prydydd y Moch, Gr. Lloyd ap D'd ap Einion, D'd Nanmor, D'd ap Gwilym, Guto'r Glynn, Kynddelw, Ievan Du y Bilwc, Bleddyn Vardd, Rys Goch or Eryri, Daniel ap Llosgwrn Mew, and Gwalchmai, from '. . . Cod. MS. Mod. in Chart. penes Dominum Rob't Pugh de Kevn y Garlheg in paroch. Lhan St. ffraid apud Denbigh'; 267-70 (XXII), 'Addenda Grammaticae D.J.J. ex Libro MS. D. R. V. penes D. R. P.'; 271-9 (XXIII), transcripts 'Ex Cod. Chart. penes D. Joan Lloyd de Aber Lhyveni' of Welsh poems attributed to Lewys Glynn Kothi, Gwilim ap Ie'nn Hen, Ievan ap Tydyr Penlhyn, Lhewelyn Goch ap Meirig Hen, and Tydyr Aled; 283-305 (XXIV), transcripts of (a) 'Ystori Gryffydd ap Cynan Brenin Gwynedd' from 'Cod. M.to Chart. pe[nes] Dom. R. Davies de Lhan[erch] convenit cum cod. antiquo me . . . penes D. Jo. Wyn . . ., Watstay', (b) 'Interdictio Papae adversus Lewelinum . . . fillium Ierwerth . . .', and (c) 'Literae Lewelini Principis Walliae ad Clerum Angliae apud London Convocatum', 1275; 307-11 (XXV), transcripts of 'cywyddau ymryson' exchanged between Owen Gwynedd and William Llyn; (continued)

315-400 ( XXVI), a copy of a Welsh-Latin vocabulary entitled 'Geiria Tavod Comroig. Hoc est Vocabularium Linguae Gomeritanae . . .' compiled by Henry Salesbury, with a list of the authors on whose works the vocabulary was based, and a list of 'Geiriau o Hen Gymraeg a'i Deongliad', etc., by the same author; 403-04 (XXVII), an incomplete copy of 'Braint ac Ystatus Griff. ap Kynan a Bleddyn ap Kynvyn'; 405-06 (XXVIII), a version of the prologue to, and a list of the court officials listed in, a Latin text of the Laws of Howel Dda; 409-65 (XXIX-XXX), a transcript of sections of the 'Red Book of St. Asaph' (see also Peniarth MS 231, NLW MS 7011D, MS SA/MB/2); 469-86 (XXXI), a copy of the 'Statutes of the Cathedrall Church of . . . Chester set forth by . . . Henrie the 8'; 489-505 (XXXII), extracts [from a version of Nennius' 'Historia Britonum']; 509-38 (XXXIII), seventeen chapters (Welsh) of pseudo-history and description of the Isle of Britain, supplementary notes on place-names, the wonders of Scotland and Ireland, and the conversion of the nations of Britain to Christianity, and a list of 'yr naw helwrieth'; 539-40 (XXXIV), lists of, and notes on, Welsh musical measures; 541-55 (XXXV-XXXVI), a list of Welsh triads ('Llyma drioedh mab y krinwas'), accounts of 'redditus assisus' of the vills of Colshull, Eulowe, Baghegr, and Rothelan, a list of the 'Consuetudines Molend' de Dee' from 'an old book of Ed'd Whitby, recorder of Chester', a list of those who rendered 'Homage and Fealty . . . to ye Prince of Wales', 29 Edward I, etc.; 557-63 (XXXVII), two lists headed 'A table for ye rest of ye contents of this book' and 'A table belonging to Coch Assaph' (for the contents of sections XXXI-XXXVII cf. the relevant parts of NLW MS 7011D); 569-95 (XXXVIII), replies [by Henry Rowlands to Edward Lhuyd's] parochial questionnaire in respect of the parishes of Llanidan, Llanedwen, Llanddeniel, Llanvair pull gwingill, and Llandysilio, co. Anglesey, partly in Rowlands's own hand; 597-9 (XXXIX), an account of 'A strange showre of Haile fallen in Anglesey and Carnarvonshire' in 1697; 601-05 (XL), extracts (Latin) with the superscription 'De Belli Marisci Origine . . .'; 607-09 (XXXVIII misplaced), notes on the words 'bod', 'caer', 'tref', etc. (pp. 597-609 probably in the hand of Henry Rowlands); 611-22 (XLI), 'A scheme of the wind and weather att Llanberis', 1 March [16]9[6] to 28 February [1697]; 623-52 (XLII), pedigrees of families in cos. Denbigh and Flint in the hand of Lewis Dwnn (described by J. Gwenogvryn Evans as a detached portion of Peniarth MS 268; see J. Gwenogvryn Evans MS 70A in the National Library of Wales, also Report on Manuscripts in the Welsh Language, vol. I, p. 1090); and 653-97 (XLIII), a copy, partly holograph, of an essay on 'The Parish of St. John Evangelist and Burrough of Brecknock' by Hugh Thomas (cf. NLW MS 777B). Holograph notes by Evan Evans ('Ieuan Fardd') on NLW MS 6209E and this volume, compositely described as MS I in the 'Seabright Collection, being Edward Lhuyd's MSS', appear in Panton MS 7 (NLW MS 1976) (see Report on Manuscripts in the Welsh Language, vol. II, p. 807 and a calendar description by J. Gwenogvryn Evans of this volume alone, described as the 'Nanhoron MS', is included in J. Gwenogvryn Evans MS 70A.

A collection of awdlau and cywyddau, including a substantial section of poems ascribed to Guto'r Glyn (pp. 151-300) and Dafydd ap Gwilym (pp. 355-379). The manuscript also includes a copy of Chaucer's Treatise on the Astrolabe (pp. 87-100). Gwenogryn Evans states that pp. 1-22, 335-406 and 410-33 are written in an archaic style in the early part of the seventeenth century, while pp. 23-85, 101-33 and 151-303 belong to the last quarter of the sixteenth century. Other parts of the manuscript are later additions, except the vellum leaf (pp. 305-6).