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A manuscript collection of prose and verse in the hand of an amanuensis of Dr John Davies, Mallwyd. The volume comprises 'Ystori Peredur fab Efrawg', with five missing folios at the beginning supplied by John Jones ('Tegid'); 'Achau'r Kwrwf'; Caerwys Eisteddfod roll, May 26, 9 Elizabeth [1567]; triads; recipes; 'Tlysau Ynys Brydain'; 'Araith Wgan'; an extensive selection of 'cywyddau' and 'awdlau', mainly 'cywyddau merched', by Bedo Aeddren, Bedo Brwynllys, Dafydd ab Edmwnd, Dafydd ap Gwilym, Dafydd Nanmor, Gruffudd Gryg, Gruffudd Hiraethog, Guto'r Glyn, Gutun Owain, Iolo Goch, Lewis Glyn Cothi, Rhisiart Phylip, Sion Cent, Sion Phylip, Simwnt Fychan, Tudur Aled and others; a collection of eulogies offered to Dr John Davies, Mallwyd, some of the poems having the date of composition recorded and including poems by Huw Machno, Sion Cain, Rhisiart, Gruffudd, Siôn and William Phylip and others; and miscellanea in various hands, including 'englynion marwnad Sion Dafis Athro parchedig mewn devinyddiaeth [Dr John Davies, Mallwyd]' by 'Rowland Vaughan esgwier o Gaergai' (1644), 'penillion gwr ifanc i'w gariad' (1688), 'moliant Sion Foulkes, Llanymowthwy', by Huw Morus (1674), 'moliant . . . maer Dinas Mowthwy' by Richard Lloyd, a fragment of 'Achau y Cwrw a'i hanes', an account of mizes paid (1646-1647), notes on Latin grammar, recipes, pedigrees, and a fragment of an interlude ('Argolws and Symoniax').

A manuscript written c. 1727 (see p. 216) containing poetry of Dafydd ap Gwilym, Edmwnd Prys, Guto'r Glyn, Siôn Phylip and others; and articles of agreement between Richard Mytton, Esq. and his tenants in the lordship of Mawddwy, drawn up at Shrewsbury on the 11th of September 1597 in the presence of T. Owen and W. Leighton, chief justice of North Wales.

A manuscript containing mainly (pp. 7-181) pieces by and in the autograph of William Salesbury of Bachymbyd, in which the author evidently deliberately imitated the style and manner of Rhys Prichard ('Yr Hen Ficer'; 1579?-1644), some of which William Salesbury also copied (see also Llanstephan MS 37). The volume also includes poetry of Siôn Tudur, Gruffydd ab yr Ynad Coch and others.

A manuscript containing poetry (pp. 3-10, 54-179, 181-362), the poets cited including Iolo Goch, Dafydd ap Gwilym, Tudur Aled, Guto'r Glyn and Siôn Phylip; medical recipes taken from the texts of Meddygon Myddfai (pp. 11-16); Disgrifiad Arfau ('a Jon Trevor ai troes or Lladin ar ffrangeck yn gymraeck - August 1 . 1632' (pp. 25-53); a copy of a document relating to the boundaries of Cyfeiliog (p. 180), which bears a note at the end: 'It doeth beare date 1204 Mr. Edw: Herbert of Mountgomery had thorriginall deed in keepinge; Mr. Jenkyn gwyn and Mr. Ifan llwyd ap dd: esqrs. did copy the same per me Wythen Jones.'
The text is written in several hands, the principal hand occurring at pp. 3-10, 55-222, ?267-350, c. 1636 (see p. 219). The text was copied from a manuscript belonging to Evan Bowen of Penyrallt, Llanidloes.

A manuscript containing poetry by Iolo Goch, Dafydd ap Gwilym, Tudur Aled, Siôn Cent and others written in a hand similar to Llanstephan MS 163, pp. 1-102. The end of the manuscript contains a copy of pp. 392-406 of Philosophical Transactions (printed 1683).

A manuscript containing poetry (pp. 5-18, 42-162), the poets cited including Iolo Goch, Dafydd ap Gwilym, Guto'r Glyn, Siôn Cent and Iorwerth Fynglwyd; apocryphal gospels (pp. 21-31); 'y Discibl ar Athro', which includes a brief summary of the Elucidarium (pp. 32-35); &c.
The manuscript is in several hands, with a few later additions to the text. Pp. 5-15 l. 6, 77-99 l. 9, 115-122, 131-136, 161-162 are in the same hand. The manuscript is sewn into a piece of old parchment dated 1647. Poetic marginalia occur at pp. 13, 77, 81, 82, 83, 85, 87, 93, 97, 103, 131, 146, 151. The work beginning at p. 108 is in the autograph of Rhys Cain or that of his son, Siôn Cain. The work beginning at p. 112 is apparently in the autograph of Siôn Clywedog (cf. an autograph englyn by Siôn Clywedog in the margin of p. 127). The work beginning at p. 144 appears to be in the autograph of Lewys Dwnn - cf. a note in the same hand relating to the work beginning at p. 139.

A manuscript containing poetry of Taliesin, Dafydd Ddu Hiraddug, Sion Tudur, Gruffudd ab yr Ynad Coch and others (pp. 1-52); the Twenty-four Feats (pp. 53-55); triads of the court of Arthur (pp. 56-57); carols (pp. 65-79); proverbs collected by Gruffudd Hiraethog (pp. 81-126); prayers (pp. 127-136); etc.
At p. 8 three triplets are written in the margin. For the estimated date of the manuscript see pp. 80, 132. The text at p. 127 differs greatly from that in the Book of Taliesin (see Peniarth MS 2).

A manuscript containing cywyddau brud and other poetry (pp. 7-8, 13-78, 87-94, 101-111, 115-130, 135-136, 154-298), the poets cited including Taliesin, Dafydd Nanmor, Dafydd ab Edmwnd and Siôn Tudur; prophecies of Merlin (pp. 79-86, 112-114, 131-134, 137-140); two imperfect documents of the Bishops of St Asaph and Gloucester, dated 1627 and 1596 (pp. 9, 11); 'Swynion a Meddeginiaetheu'; &c.

A manuscript containing poetry, prophecies, 'histories', etc. and including 'Kynghorev Kattwn ddoeth ar bardd glas or gadeir' (pp. 27-29). The poets cited include Taliesin, Iolo Goch, Siôn Cent and Lewys Morganwg.
The text beginning at p. 39 is imperfect and the end is wanting from the texts beginning at pp. 42, 80, 116. Four leaves, more or less fragmentary, by a later hand, have been bound between pp. 82 and 83, the end wanting from the text on the last leaf of this section. At p. 112b, c is a misplaced leaf containing English poetry.

A collection of papers, mainly in the hand of William Owen [-Pughe], containing original Welsh poetry, poetical translations, transcripts of medieval Welsh poetry and prose texts, autograph letters and miscellaneous notes, including: 1, 'Englynion i Mr. Aneiryn Owen ar ddydd ei enedigaeth 1808' by Rob[er]t Dafies, with a pencil sketch on the dorse; 2, 'Anerchiant i Deulu Egryn Calan Ionawr 1834' by R.D.; 3, translations by 'Dafydd Ddu o Eryri', [David Thomas], one dated 1790, entitled 'Sibli's Prophecy' and 'The Lover's Complaint'; 4, 'Awdyl Dydd y Varn, yn of Geiriau Ysbryd y Gwirionedd. Cyvieithiad Gan Idrison' [=William Owen- Pughe], dated 1808, and three 'englynion' by Tho[mas] Jones, Llynlleiviad, 1820; 5-7, 'Coroni Sior IV' by 'Idrison', 1820, (printed, three copies); 8- 9, a translation by 'Idrison', 1820, and a second copy set to music, of Alexander Pope's poem 'The Dying Christian to his Soul'; 10, a 'cywydd', 1821, entitled 'I Gyfieithydd Einioes Dyn', and five 'englynion' 'At y Parçedig J. W. Jencyn, Erbrwyad [sic] Ceri'; 11, 'Englynion Cofa [sic] am y Parç Evan Richards, [i.e. Evan Richardson] Gynt o Gaerynarvon yr hwn . . . a hunodd . . . Mawrth 29 1824', by 'Iago Triçrug', [James Hughes]; 12, translations by 'Idrison' of two poems by F[elicia] Hemans entitled 'A Dirge on the death of a child' and 'The Invocation'; 13, transcripts, 1826, of poems entitled 'The Memory of the Brave' and 'The Star of the Mine' by Felicia Hemans; 14, transcripts of poetry by Gwalchmai, Casnodyn, Owain Cyfeiliog and Llywarch Prydydd y Moch; 15, 'Llythyr Angen at yr hybarch Wyneddigion i ofyn Geiriadur dros Fardd Newynog', an 'awdl', 1826, sent by 'Dewi ap Huw Cynwyd' to Docr. Owain Pugh; 16, stanzas entitled 'Can i Hav'; 17, a stanza with variations by 'Gwylim [sic] ab Owen', dated 1782, 'A'r Bardd a safodd ar y tywyn . . .'; 18, 'Awdl y Raglawiaeth', (?incomplete); 19-21, poems transcribed from 'Llyfr Taliesin' and 'Llyfr Du Caerfyrddin' in 1819 and 1834; 22, 'Arymes Prydain', with translation and notes, (incomplete); 23, transcripts, dated 1825, of parts of the tales of 'Peredur' and 'Siarlymaen' copied from [Peniarth MS 7]; 24, text and parallel English translation of 'Cymdeithas Amlyn ac Amic', dated 1831; 25, transcript of ['Imago Mundi'] beginning 'Y [ sic] Asia y mae paradwys. . .' and ending '. . . y mvc hvnnv aesgyn or dvfyr', and a Welsh chronology text from Adam to the year 1318; 26, transcript of part of the tale of 'Culhwch ac Olwen' beginning 'Cerdded á orugant hvy y dydd hvnv eduçer . . .' and ending '. . . Ac velly y cavas Culhvq Olwen, merç Yspyddadan Pencavr'; 27, a transcript, 1825, of Gruffudd Hiraethog's licence as 'Penkerdd', from [Peniarth MS 194]; (continued)

28-41, a group of letters: 28, William Probert, Walmsley Chapel, 1822, to William Owen Pughe in London (literary matters), 29, Wm. Owen Pughe at [?Egryn, Denbigh], 1826, to Capt. Tuck, North Brixton (a journal of their travels, including a visit to Hengwrt), 30, Rich. Llwyd, Chester, [1830], to Dr. Owen Pugh, Egryn, Denbigh (regarding a memorial to Owen Jones, 'Owain Myfyr'), 31, Richd. Llwyd, 1833, to Dr. Owen ab Huw (health matters and 'Myfyr' memorial), 32-33, S. Prideaux Tregelles, Neath Abbey, 1833, to Aneurin Owen at Egryn (2) (concerning various chronicles), 34, J. C. Williams and Thos. Hughes, Aldermen, Denbigh, 1834, to Aneurin Owen at Egryn (invitation to a public dinner in honour of his father, cf. item 45), 35, Wm- Owen Pughe, 1834, to Aneurin [Owen] (financial and family matters), 36- 38, Wm. Blamire, Tithe Office, London, 1843, to [Aneurin] Owen (3) (re Enclosure Bill), 39, [Lord] Worsley, London, 1843, to Aneurin Owen, Egryn (an agrarian query), 40, draft reply, 1843, from [Aneurin Owen] to [Lord Worsley], 41, R. Llwyd, [Chester], [n.d.], to Dr. W. Owen Pugh, Egryn (concerning a memorial to 'Owain Myfyr'); 42, an essay entitled 'Y Cyvnewidiadau a ddygwyd asant yn yr iaith gymraeg er dyddiau Taliesin; a'r achosion ei bod wedi cadw yn ei phurdeb dros gyniver o oesoedd', by 'Pryderi'; 43, lists of poems in 'Llyfr Taliesin' and 'Llyfr Du Caerfyrddin', together with a list of 165 MSS in the Vaughan [Hengwrt] library; 44, a printed letter, 1818, from Thomas Roberts, Llwynrhudol, on behalf of 'Cymdeithas y Gwyneddigion' in London, to the parishioners of Llanbeblig, co. Caernarfon, commending their protest against the appointment of an Englishman to the incumbency; 45, printed announcement, 1834, of a public dinner to be held in honour of W. Owen Pughe, D.C.L.; 46, notes, 1806, recording a visit to Llyn Llymbren, etc., with two sketches; 47, notes of a visit to Penmynydd, co. Anglesey; 48, chronicle of events, 720-872 A.D.; 49, particulars of the altitude of mountains in England and Wales copied from a survey made by Col. [William] Mudge; 50, a drawing of a 'Golden Lorica found at Mold'; 51-52, Welsh versions, one incomplete, of Chapter 1 of the Gospel according to John, by [William Owen-Pughe], dated 1832; 53, translations of poems and extracts, including 'Preiddeu Annwn' and part of 'Y Gododdin', and notes on 'The Manner in which Arthur is spoken of by the Bards. . .'; 54, a note on 'Dalriada' from [George Chalmers], Caledonia, I, (London, 1807); 55, extracts from [James] Grant, Thoughts on the origin and descent of the Gael . . . (Edinburgh, 1814), notes on bee-keeping, and the dimensions of the Rotheram Plough; 56, a broadside entitled 'At y Cymry', being an appeal by 'Y Cymro' to his fellow-countrymen to resist the menace of France; 57, a royal proclamation commanding economy in the use of grain, 1800, (printed); 58-59, two versions of 'O, nid i ni, ein Ior . . .'; 60, stanzas beginning 'Digona y daioni . . .'; 61, Rheolau . . . Cymdeithas Gyfeillgar Nantglyn (Dinbych, 1834); 62, attested copy, 1829, of a terrier of the glebe lands and tithes of the parish church of Nantglyn, co. Denbigh, dated 1791; 63, 'Amry govion Hydr. 24, 1823', containing an incomplete religious tract headed 'Y Gwir yn erbyn y byd', being a translation by 'Idrison' dated 1821, expository notes on the Book of Genesis, an incomplete draft letter to the editor of The Political R[egister], as well as notes relating to the science of obi or witchcraft; 64, 'Amrywion', containing 'Ateb i Wrthwynebiadau i'r galwad hwn. II Lyvyr o Weledigaethau, Tam. III. T.D. 64 .'; and 65, notes, 1826, relating to medieval romances.

A manuscript containing poetry of Bedo Brwynllys, Dafydd ap Gwilym, Guto'r Glyn, Huw Cae Llwyd and others (pp. 1-136, 149-159); a vocabulary (pp. 137-149); Dafydd Ddu [Hiraddug]'s Grammar (pp. 161-198); the statutes of Gruffydd ap Cynan (pp. 199-206 (at the end of this extract is the note 'Dyma y maint a gebhais o'r Statut yn lhybhyr Meistr Sion ap Edward gam o drebh newydd, o blwybh Dewi yn Sir bhracheiniog . 1579 .'); a translation into Welsh of Genesis I (pp. 230-245); Biblical extracts and history (pp. 246-264) (a note on p. 252 records that the Biblical extracts were taken 'o lybhyr Mr Edmond Morgan o Bhedwelhty'); &c. All but pp. 256-259, 265-268 and part of p. 198 are in the autograph of the grammarian Dr John David Rhys (1534-1609); his peculiar orthography begins on p. 13, l. 21. The poetical extracts vary in length from three to fifty lines. The lines selected are not always consecutive; they are even occasionally fragmentary, and many words are explained or glossed. The awdl on p. 256 is in a different but contemporary hand from that of Dr John David Rhys. For p. 265, cf. the text on pp. 22-24, which agrees in part. For the dating of this manuscript see p. 207.
The text printed in Dr John David Rhys's Grammar (London, 1592), pp. 297-298, 301-302, 303 (cols. ii and iii), pp. 300-301, p. 303, col. iv, p. 303, 'Nota', and p. 304 is taken from, respectively, pp. 199-206, 207, 207b, 213, 214, and 224 of this manuscript.

A manuscript containing prophecies in prose and verse and including alleged prophecies of Myrddin and Taliesin and the works of Iolo Goch, Dafydd Llwyd and Rhys Nanmor.
The text at p. 39b is said to be 'copied out of the Chronicle of Guttun Owain'. The text at the end beginning 'Proffwydoliaeth Banastr o Brydain fawr ...' is continued on p. 13 of the manuscript.

Welsh proverbs collected by John Morgan which had been omitted from the Dictionary of Dr John Davies, Mallwyd. Also included in the manuscript are a series of the first couplets of Dafydd ap Gwilym's poems.

A composite volume of collections of Welsh poetry and prose made about 1635. The title is derived from the third section which contains a number of poems to members of the Wynn family of Moelyrch in Llansilin. Amongst the poets represented are Hywel Cilan, Tudur Aled, Rhys Cain, Gruffudd Hiraethog, Sion Cain, Guto'r Glyn, Edmwnd Prys, Lewis Glyn Cothi, Iolo Goch, Cynddelw Brydydd Mawr, Iorwerth Fynglwyd, Taliesin, Dafydd ap Gwilym, Dafydd Nanmor and Wiliam Cynwal. Miscellaneous material in the volume includes a copy of an award relating to Moelyrch, 1540; a fragment of a letter by Charles I; the pedigrees of Oliver Cromwell, Holland and Morris, and Kyffin of Bodfach; a roll of the Caerwys Eisteddfod, 1567; an extract from 'Breuddwyd Rhonabwy'; a list of the sheriffs of Denbighshire from 1541 to 1635, with additions to 1658; a copy of documents relating to the treaty of alliance concluded between Charles VI of France and Owain Glyndŵr; extracts from the epigrams of John Owen; and extracts from scripture.

A composite volume largely in the hand of D. Silvan Evans containing transcripts of 'cywyddau' and 'awdlau' by Guto'r Glyn, Gutyn Owain, Sion Tudur, Dafydd ap Gwilim, John Rhydderch ('or Amwythig'), Tudur Aled, Lewys Môn, Owain Gwynedd and Wiliam Lleyn; 'Cedymdeithyas Amlyn ac Amic' (from the Red Book of Hergest), with notes and extracts on 'The Legend of the two faithful Brothers', 'englynion', etc. by [Walter Davies] ('Gwallter Mechain'), Hugh Evan ('Hywel o Eryri'), Rowland Hugh ('o'r Graienyn, Bala') and [John Jones] ('Tegid'), occasioned partly by bardic controversies at eisteddfodau held at Corwen and Bala in 1789 (extracted partly from a manuscript of Rowland Hugh); 'Ystoria Charles' (from the Red Book of Hergest); 'Cân am Orthrymderau'r Cymry' by Siencin Lygad Rhawlin (c. 1695) (transcribed 24 June, 1880, from Llanover MS[c]40 i.e. NLW MS 13127, pp. 399-401, and printed in Y Genhinen, 1883, pp 135-6); 'Marwnad y Tri Morwr o Aberporth -- ' by Evan Thomas Rhys; 'Hen ddywediadau neu ddiarhebion Cymreig'; an English translation by Walter Davies ('Gwallter Mechain') of 'Canu i Ddewi' by Gwynfardd Brycheiniog; etc. The spine is lettered 'Gwaith G. Glyn, Gutyn Owen, Tudur Aled'.

The 'book of Jaspar Griffith', containing poetry by Dafydd ap Gwilym, Rhys Fardd, Iolo Goch, Taliesin, Dafydd Llwyd ap Llywelyn ap Gruffudd [Dafydd Llwyd, Mathafarn] and others. Item 1 is a series of complaints between several parties 'fel y maent yn scrifennedic o Law Gyttyn Owein'. Items 2-15, 17-46 contain a series of englynion 'o hen lyfr oedd gyd a S. Trefor Trefalun'. There is a note at item 128 possibly in the hand of Dr John Davies, Mallwyd. A note at Item 201 states: 'Hyn sy yn canlyn a dynnais i allan o'r Llyfr Du o Gaerfyrddin'. The first line of item 264 is given by some as the first line of Item 263, which forms a second half of this cywydd. For Items 266 and 270, where Huw Pennant and Dafydd ab Edmwnt are here given respecitvely as the authors of the works, a later insertion claims authorship as being that of Dafydd Llwyd ap Llywelyn ap Gruffudd (Dafydd Llwyd, Mathafarn).
Jaspar Griffith at one time had in his care or possession Peniarth MSS 1 and 53, both of which are largely copied in this manuscript. The style of the handwriting resembles certain of Griffith's marginalia in Peniarth 1 and 53 so it is inferred that this manuscript is also in his hand. The paper used for this manuscript was originally designed for what looks like a Latin vocabulary; however, one line only was written at the top (now the bottom, inverted) of the page. Items 159-172 are as in Peniarth MS 53 (pp. 1-29, 34) but more complete here. Cf. Peniarth MS 50 (pp. 222b-236, 304). Items 175, 176, 177, 180, 181, 182, 183, 190 occur also on pp. 15, 54, 112, 88, 91, 126, 99, 68 respectively of Peniarth MS 53. The text at items 203-236, 271-274 corresponds with Peniarth MS 1. Inserted at Item 237 is a transcript 'verbatim out of a printed book now supposed to be in the custody ... of Hugh Bevan ... of Llanwnen', which describes the 'Characters' of the gentry of Cardiganshire, Carmarthenshire and Pembrokeshire during the Protectorate. The note is signed 'O. P. Maridunensis'.

A photostat facsimile of Balliol MS 353, a commonplace book of Sir John Price (1502?-1555). The manuscript contains genealogical memoranda relating to the family of John Price (Siôn ap Rhys) and his wife, Johan Williamson, notes on Welsh bardic grammar, proverbs, triads, and miscellaneous memoranda; transcripts of Welsh poetry including eulogies of the compiler and of his ancestors. The poets represented include Bedo Brwynllys, Dafydd ab Edmwnd, Dafydd ap Gwilym, Dafydd Llwyd ab Einion Llygliw, Dafydd Llwyd ap Llywelyn ap Gruffudd [Dafydd Llwyd Mathafarn], Dafydd Nanmor, Gruffudd ap Maredudd, Gruffudd Gryg, Gruffudd Hiraethog, Gwilym ab Ieuan Hen, Huw Pennal, Hywel Dafydd ab Ieuan ap Rhys, Mr Harri (Cydweli) [Harri ap Hywel ('Mastr Harri')], Hywel Llwyd ap y Gof, Hywel Swrdwal, Ieuan Deulwyn, Ieuan ap Rhydderch ab Ieuan Llwyd, Ieuan ap Tudur Penllyn, Ieuan Du'r Bilwg, Ieuan Gethin ab Ieuan ap Lleision, Ieuan Tew, Iolo Goch, Lewis ap Richard alias Morgannwg, Llywelyn ap Maredudd ab Ednyfed, Llywelyn ap Owain, Madog Benfras, Rhys Nanmor, Siôn Cent, Siôn Mawddwy, Thomas Vychan [Vaughan], Taliesin ('yr awdl fraith'), and Tudur Aled. The principal items of Welsh prose are anecdotes relating to Coch y Powtsh, Christopher Mathew of Glamorgan, and Tudur Aled, under the title 'Geiriau digri yr hwnn ny ellir y hadrodd mewn Iayth arall'; a text entitled 'Kyngor y wr ddwyn y vuchedd yn galh ac yn gymedrol'; and a bardic grammar.

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 manuscript containing the poetical works of Lewis Glyn Cothi, Tudur Aled, Tudur Penllyn, Sion Cent, Ieuan ap Tudur Penllyn, Rhys Cain and others. There is some controversy as to whether f. 137 contains work by Llewelyn ab Ieuan or by Deio ab Ieuan Du. The volume is labelled 'Odlau a Chywydda. A. 4°'.
Ff. i-ii, 137-143b are not in the same hand as the rest of the manuscript, and ff. 144b-146 are in a modern hand. Ff. 1-56 may be copied from Peniarth MS 109; the order of the poems is the same at first, but the readings do not always agree, and there are four poems in this manuscript which are not in Peniarth MS 109. Pp. 11-96 of Peniarth MS 77 are copied from this manuscript. William Salesbury or Sir T. Wiliems has written what looks like 'rhyderch ap Howel ap Dauyd' on f. 136b.

This manuscript is apparently in the same hand as large portions of the Red Book of Hergest and Peniarth MS 32. The contents, with few exceptions, are manifestly taken from Jesus College MS 2 and Peniarth MS 5. Pp. i-vi belong to the fifteenth century and contain pedigrees (p. i) which are somewhat difficult to decipher; triads (p. ii); and poetry by Dafydd ap Gwilym and Ieuan Dew Brydydd (p. iv-vi).
The twenty folios which are missing between ff. 20b and 21 now form part of Peniarth MS 12, pp. 77-116. For f. 26 (Y llyvyr hwnn yw y trydydd llyvyr or llyvyr aelwir Kyssegyrlan Vuched ...) see Llyvyr Agkyr Llandewivrevi, pp. 86-103; for f. 41b (Dangos pa delw ydyewir y tat ar mab ar yspryt glan ...) see ibid., pp. 162-3; for f. 42 (Mal hynn y digawn ytat ar mab ar yspryt glan ...) see ibid., p. 138-40; for f. 43b (Dangos y mod y dylyo dyn gredu ...) see ibid., pp. 141-4; for f. 46 (Llyma seith rinwed yr eglwys) see ibid., pp. 145-6; for f. 47 (Valhyn ydyweit hu sant o wedi y pader) see ibid., pp. 147-51, l. 3; for f. 52 (Breudwyt bawl) see ibid., p. 152-6; for f. 54b (Llyma ebostyl y sul) see ibid., pp. 157-9, l. 6; for f. 56 (Rinwedeu offeren sul) see ibid., p. 151; for f. 56b (Ypotis weithon y gelwir hwnn) see ibid., pp. 128-37; for f. 62b (Valhyn y treythir o ach dewi ...) see ibid., pp. 105-18; for f. 71b (Dywededic vu hyt hynn o vuched dewi sant ...) see ibid., pp. 119-27. The text at f. 80 (Historia de Adamo morituro et de Seth in paradiso ...) is the same as that in Peniarth MS 32, p. 239 (cf. Bodley MS Laud Misc. 471, f. 66). The Welsh text at f. 84b corresponds with chapters I-XLI of B. Harris Cowper's edition of The Apocryphal Gospels, pp. 29-82.For f. 125 (Ystorya titus aspassianus) see Peniarth MS 5, f. 36; for f. 129b (Llyma ual ytreythir o ystorya pilatus ...) see ibid., f. 10; for f. 131 (The end ... of the Life of St Catherine) see ibid., f. 21; for f. 132 (Buched meir vadlen) and for f. 135b (Llyma weithyon vuched martha) see ibid., f. 26; for f. 137 (Purdan padric ...) see ibid., f. 58, but with verbal differences throughout. At f. 160 (Athrawon agawssant y geluydyt honn ...) note that in the older MSS the month Rhagfyr (December) comes before Tachwedd (November). For f. 160b (Argoelon y vlwydyn ...) cf. Peniarth MS 12, p. 124; for f. 163 (Dy gygor ath gyssul yw ...) see ibid., p. 125. For f. 164b (Llyma ual y treythir o gynghoreu catwn ...) cf. Peniarth MS 3, p. 31 and 27, ii (pp. 16-20). For f. 172b see Peniarth MS 14, pp. 1-20, omitting items under pp. 6, 7, 14; there are slight verbal differences in the text and a tendency to insert passages about the 'Catholic faith' and the 'virgin mother'. The end of the manuscript is missing: the final words are 'Lleidyr oed gynt . ae enw ebbo ... tebygu na ladyssei y magyl arnaw . yn y lle nessau attaw aorugant ar uedyr'. A letter dated at Talgarth on 19 September 1719 and addressed to 'the Rev. Moses Williams att Dyfynnog in Breconshire' is bound in at the end of the manuscript.