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An imperfect quarto manuscript inscribed in gilt on the spine 'Llyfr Du Pantlliwydd'; the name is probably derived from the colour of the previous binding (see binding note) and from the fact that sometime in the second half of the eighteenth century the volume formed part of the library of Thomas Truman of Pant-y-lliwydd in the parish of Llansanwyr, Glamorgan (see TLLM, tt. 216-17, 220, 315-18). Of the extant folios, pp. 1-204 contain the now incomplete (wanting beginning, end, and contents of a few intermediate leaves) corpus of heraldic and genealogical material believed to have been transcribed or compiled by Anthony Powel of Llwydarth in the parish of Llangynwyd, Glamorgan (see TLLM, tt. 115, 149, 214-18). The contents, pagination in brackets, include notes on the signification in heraldry of various colours such as black, white, and azure, animals such as the boar, dog, stallion, and bear, birds such as the eagle, hawk, owl, and griffin, fish such as the crab, and inanimate objects such as the twelve types of crosses (1-39); descriptions of various heraldic devices and terms with certain rules governing their use (39-60); notes on, or descriptions of, the coats of arms of Brytys, Lokreinys, Albanakdys, Kamber, Dynfwal Moel Myd, Beli, Ythyr Ben Dragon, Arthyr, Kystenin ab Kadwc, Kynan Wledic, Maelgwn Gwynedd, Karedic, Kydwaladr, Ifor, and Ynyr, of the Saxon kings of England from the time of Edbert to the time of 'Saint Edwart Frenin' (also including the Danish rulers Swayn, Knot, and Harknot), and of the Norman kings of England and their successors from the time of 'Wiliam Kwngkwerwr', etc. (61-72); brief descriptions of the arms of some sixty-three British / Welsh kings (including legendary figures), princes, lords, saints, and others, including e.g. Brytys, Beli, Arthyr, Dewi, Teilo, Kradoc Freychfras, Iestyn ab Gwrgan, Rys ab Tewdwr, Ednyfed Fychan, etc. (73-82); brief descriptions of the arms of the Norman conquerors of Glamorgan ('llyma arfay y kwngkwerwyr a fyont ymorganwc'), e.g. Iarll y Klar, Ysbenser, Flemin, Twrberfil, Gamais, etc. (82-5); a list of the names of some one hundred and five, mainly legendary, kings [of Britain] from the time of Brytys to that of Kydwaladr with the names of Henry VII and Henry VIII added at the end (85-7); a list of largely legendary kings of Britain from the time of Brytys ab Silyf to the time of Kydwaladr, the last king, with notes on their attributes, events of their reigns, etc., under the superscription 'Llyma enway y pedwar brenin ar hygain o frenhinoedd ynys brydain a farnwyd yn gydarnaf ac yn wrolaf y gwngkwery ac y adailiad ac y roddi roddion ardderchawc ...' (87-105); a genealogy of Henry VIII tracing his descent in direct male line from Brytys and thence from God (105-8); another briefer genealogy of the said Henry VIII tracing his descent, through male and female ancestors, from Kydwaladr Fendigaid, last king of the Britons (108-9); pedigrees of the mothers of the males appearing in the Henry VIII pedigree (109-14); seventy miscellaneous brief pedigrees the great majority commencing with the words 'Llyma wehelyth' associated with place-names, mainly commote names, such as Abergwyli, Llanfynydd, Kethinoc, Llandybie, Karnwyllon, Kydweli, Kwmwd Perfedd yn Ha ... dion, Kwmwd Perfedd ywch Arfon (Aeron), y Kreyddyn ywch Arfon (Aeron), Myfienydd, Glyn Aeron, Llan Gybi, Llan Ddewi Frefi, Mab Elfyw, Kayo, Mallaen, Penryn Dyfed, Elfed, Hirfryn, Mabynion, Gwinionydd Ywchaeron (Ywch Kerdin, Is Kerdin), Kaer Wedros, Gwidi Gada, Yrwystli, Kaer Sws, Kyfeilioc, Llan Bryn Mair, Brecheinoc, Peytyn, yr Argoed, Yslwch, Aber Ysgyr, Dyllyn Hodni, Lliwel, Ysg ... throc, Tir Rawff, Llanfihangel y Kwmdy, Arth Brengi, and Mon, or directly with personal names and tracing descents from, inter alios, such personages as Elystan Glodrydd and thence Beli Mawr, Gwaith foed, Llawdden, Dinawal and thence Rodri Mawr, Maenerch and thence Koel Godeboc, Brychan Brycheinoc, Kynedda Wledic, Einion Sais, etc. (115-42); an incomplete list of the fifteen tribes of Gwynedd - 'llyma bymthegllwyth gwynedd' (142-5); (continued)

Six brief pedigrees of descendants of Gr. fab ap Gr. Gwyr and thence of Koelgodeboc (145-7); fifteen brief pedigrees six of which commence with the words 'llyma wehelyth' with the place-names Glyn Nedd, Rwng Nedd ac Afan, and Tir Iarll, and one with the phrase 'llyma wehelyth Sir Siôn Wiliam, meistr o siwels y brenin', and all tracing descents from Einion ap Gollwyn and Iestyn ap Gwrgan, followed by two pedigrees tracing the descent of the said Einion from Beli Mawr and the said Iestyn from Brytys (147-54); ten brief pedigrees five of which commence with the formula 'llyma wehelyth' with the place-names Glyn Rodne and Llan Daf or the personal names Siangcin ap Aron, yr Arglwydd Rys ap Tewdwr, and y Dokdor Leison, one with the place-name Seinghenydd, and the others with a personal name, and tracing descents from, inter alios, Maenerch, Koel Godeboc, Maglawn, pryns yr Alben, and Beli Mawr (154-9); notes relating to the legend of the building of the city of 'Troya newydd' by Brytys, first king of the Britons, and its renaming as Kaer Lydd by Llydd ap Beli and as Llyndain (London) subsequent to the Saxon conquest (160-61); similar notes relating to the building of the cities of Kaer Efrawc (York) and Kastell Mynydd, subsequently called Ednbwrch (Edinburgh), by Efroc Gadarn, fifth king of the Britons (161-2); a list of the names, in English and Welsh, of the chief cities allegedly built by the Britons ('enway y prif ddinesydd awnaeth y brytaniaid') (162-4); a maternal pedigree of Gwladys ferch D[afydd] Gam (164-5); genealogical data relating to the Twrberfil (Turberville) family (165-7); a pedigree tracing the descent of Gr[uffydd] Dwn from Epiliws 'hen frenin Dyfed' (167-8); brief notes on the arms of the aforementioned [Gruffydd] Dwn, the Wiriod [family] of Pembrokeshire, Llywelyn Foethys, Brenin Manaw, etc. (168-9); brief pedigrees of Arthyr (on paternal and maternal side), Harri Sant o Winsor (Henry VI), and Llywelyn ap Gr. (170-71); notes relating to 'Bonedd ac anfonedd' (nobleness and ignobleness), the origin of the laws of heraldry, etc. (172- 5); genealogies of the saints of the island of Britain (176-86); a note on the signification of fish in heraldry (186-7); brief descriptions of the arms of Gwalchmai, Bledri, the kings of Maroc, Fraingk, Ysbaen, and Hwngry, the duke of Kornwal, the emperor of Konstinobl, and the emperors of Yr Albaen and Yropia (187-9); genealogies ('llyma wehelyth') of Sir Siôn ap Rys and Meistr Lewys Gwyn (189-90); a note relating to Morgan Amheyryc, the last Welsh lord of Koety, and ? his grandfather Gr' ap Iestyn (190-91); notes on Sioned, wife of Addaf Fychan and subsequently of Ieuan ap Ll', and her two sons (191-2); notes on the five sons of D'd ap Mathay (192-3); miscellaneous genealogies (193-9); genealogical notes relating to the family of Twrberfil, lords of Koety, with a reference to the loss of their 'arglwyddiaeth rial' (iura regalia) by the said lords of Koetty (200-01); a genealogy ('llyma wehelyth') of Hari lewys 'o sain pyr' (202); and brief notes on the arms of the kings of mwroc, ffraink, ysbaen, hwngri, boham, groec, nafarn, napwls, portingal, sisil, seipris, pwyl, ysgotland, and denmark, the duke of kornwal, and the emperors of konsdentinobl, yr albaen, and kripepende (202-04). Page 210 contains twenty lines of Welsh verse in the 'cywydd' metre.

A composite volume containing miscellaneous prose and verse items in the hand of Edward Williams ('Iolo Morganwg'). Page i is inscribed 'Brith y Coed Sef Cynnulliad Cymmysg o Hen Bethau Cymreig, Rhyddiaith a Phrydyddiaeth. Cynnulliad Iolo Morganwg. Rhifyn IV', and pp. iii-vii contain a list of ninety-four items being the contents of pp. 1- 144. These include, pagination in brackets, transcripts of Welsh poems (sometimes single stanzas) or extracts from Welsh poems attributed to Gwydion ap Don (from the Mabinogi) (1), Lln. Moel y Pantri (2), Lln. ab Hywel ab Ieuan ab Gronw (5, 101-04, with a note on the bard 104-05), Dafydd Gorlech (5), Gruff. ap Gronw Gethin (6), Rhys Llwyd Brydydd (6, 73), Ieuan Gethin ab Ieuan ab Lleison (17, 74, 122), Thomas Llywelyn 'o Regoes' (17), Siôn Tomas Hywel 'o Lanbedr ar Fro' (29), Thomas Wiliam Hywel (29), Thomas Lewys 'o Lechau' (29-30), Harri Meirig (35), Taliesin Ben Beirdd ( 49-55, 78-9), Dafydd ap Gwilym (72, 130), Iorwerth Fynglwyd (73-4), ? Rhys Nanmor (73), Ieuan Du'r Bilwg (74), Twm ab Ifan ab Rhys (75-7), Gruffydd Llwyd Dafydd ap Einon Lygliw (97-100, with a note relating thereto), Siôn Rhydderch (106-07), Dafydd Hopcin 'o'r Coetty' (108), Rhisiart Thomas (109 ), Teilo Sant (114-15), Casnodyn Fardd 'o Gil Fai' (116), Dafydd Lewys 'o Ferthyr' (120), Lleison Cradoc 'o Dregolwyn' (121), Rhys Brydydd (121), Owain Gwynedd (121), Dafydd Benwyn (122), Wm. Cynwal (122), Huw Machno (130), Edwd. Richards (130), Hywel Rhys (130), Hopcin ap Thomas 'o Lynn Tawy' (132), Llywelyn Goch ab Meurig Hen (132), Siôn Tudur (136-41), Siôn Mowddwy (141), Llawdden Fardd (143), Tudur Wiliam (144), John Daf. ap Jenkin (144), and Llywarch Hen (144); transcripts of unattributed Welsh verse including a series of fourteen 'Englynion yr Adar' with notes by [Edward Williams] 'Iolo Morganwg' relating thereto (37-9), a series of eighty-four 'Englynion Arthur a'r Eryr a hwnnw oedd Eliwlod Nai Arthur ag Arglwydd Llancarfan' with notes relating thereto by [Edward Williams] 'Iolo Morganwg' (79-95), and an 'englyn' (131); notes on 'Adar Rhiannon' and 'Blynyddau'r haul a'r Lleuad' (2); genealogical data relating to the descent of King Arthur including an anecdote relating to Brân fab Llyr (3- 4); genealogical data relating to 'Taliesin Ben Beirdd' and 'Morganiaid Tredeger' (7-8); a copy of the inscription on the gravestone of William Hopkin [the reputed poet], ob. 1741, and of an 'englyn' thereon attributed to his mother, and a brief note on his family (9; see TLLM, tt. 251-9); notes, mainly genealogical, relating to Rhys Brydydd of Llanharan [co. Glamorgan] and his family (10); a brief genealogy of William Bleddyn, bishop of Llandaff [1575-1590] (11); notes relating to Cuneddaf Wledig and his sons (11-14); notes on Saint Brychan and Morgan ap Einydd from whom allegedly Brycheiniawg and Morgannwg derived their names (15-17); a copy of a version of the statute reputedly drawn up by Gruffudd ap Cynan for regulating the order of bards and musicians with brief notes on the said statute by [Edward Williams] 'Iolo Morganwg' (18-28); miscellaneous genealogical data (30-36, 48, 113); horticultural and agricultural instructions extracted 'o Hen Lyfr Esaia Pywel o Lansainffraid ar ogwr' being a work allegedly compiled in 1591 by Rhisiart Siôn Huw 'o'r Coetty' ( 40-48) ; notes on the Welsh bardic order as it was previous to the time of Gruffydd ap Cynan ('Llyma Drefn ar wyr wrth Gerdd Dafawd a elwir Hen Drefn Deheubarth ag a fu yng Ngwynedd cyn nog amser Gruffydd ap Cynan') (56-60); a list of fifty Welsh triads headed 'Llyma Drioedd Cerdd' (60-68); a list of Welsh proverbs allegedly extracted from a larger collection 'Yn Llyfr Thomas Bona' (69-72); a transcript of a letter in Welsh from Llywelyn Siôn from Llangewydd to Meuryg Dafydd of Llan Nisian [both of co. Glamorgan and fl. late 16th cent.] (the books relating to the bardic craft 'Llyfrau cerdd dafawd . . . sef pump llyfr Cerddwriaeth' which he, Llywelyn Siôn, had been copying were ready for collection, recipient should receive one pound for them, he had heard that the person who wished to have the volumes intended publishing a work on the subject in Welsh and Latin, knowledge of the Welsh bardic craft would disappear except for the composing of 'cwndidau') (96; for the opinion that it is a forgery to be attributed to Edward Williams himself see TLLM, t. 93, n. 45, and t.158, n. 56); (continued)

Notes relating to 'eisteddfodau' held at Ystrad Owain, Glamorgan, with particular reference to an 'eisteddfod' held there in 1720, and transcripts of 'englynion' composed in connection therewith (105-12; see TLLM, tt. 272-7); a brief note on the connection between some of the gentry and clergy of Glamorgan and Welsh poetry until ? comparatively late in the eighteenth century (112); a short list of Welsh triads, a few Welsh proverbs, lists with the superscriptions 'Wyth prif Gampau Dedwydd', 'Naw Llawenydd y Nef', 'Yr Wyth Brifwyd', 'Wyth Weithred Trugaredd', and 'Wyth Defnydd Dyn', and a list of sayings attributed to Cattwg Ddoeth (117-20); notes relating to Rhys Brydydd of Llanharan [co. Glamorgan] and his sons Rhisiart and Ieuan and tales relating to his grandson Thomas (123-9; for the Welsh text see Iolo Manuscripts, pp. 200-03, and for an English translation ibid., pp. 614-17); miscellaneous triads (131); notes on and a list of 'Breiniau Gwyr Arfon' (133-6); and Welsh medicinal recipes (142-3). Pp. 153-5 contain a list of fifty-one items being an incomplete list of the contents of pp. 157-384 Previously paginated 1-228. Included, pagination in brackets, are a copy of 'Gwassanaeth Meir' [being a middle Welsh version of the 'Officium Parvum Beatae Mariae Virginis'] transcribed by [Edward Williams] 'Iolo Morganwg' in June 1799 from a manuscript in the hand of John Jones [of Gellilyfdy, co. Flint] then in the library of Thomas Johns of Hafod Ychtryd, co. Cardigan [now Hafod MS 23 in the Cardiff Free Library] (157-211); a section headed 'Tri achos y dioddefawdd Crist archollion . . . ' and two Welsh triads (212 ); transcripts of two sequences of 'englynion' the first attributed to Mab Claf ab Llywarch or Llogell Rhison and the second to the said Mab Claf ab Llywarch, and of a poem attributed to Taliesin Ben Beirdd (213-20); transcripts of seven prayers described as 'Emynau Curig Ferthyr' (221-5); a copy of an anecdote relating to Owain Glyn Dwr and Syr Lawrens Berclos (225-6); transcripts of three sequences of 'englynion' (each stanza commencing 'Coronog Faban') attributed to Aneurin Gwawdrydd, Jonas, athraw Mynyw, and Rhys Goch o'r Ryri respectively with notes [by Edward Williams] on the three sequences (227-38; for the Welsh text see Iolo Manuscripts, pp. 265-71 and for an English translation ibid., pp. 673 et seq.); four more sequences or 'awdlau' containing 'coronog faban' stanzas, the second being attributed to Gildas Broffwyd and the fourth being copied, with revised orthography, from Thomas Pugh: Brittish and Out-landish Prophesies . . ., London, 1658 (239-56; for the Welsh text see Iolo Manuscripts, pp. 271-82); an incomplete copy of an 'awdl' attributed to Cuhelyn Fardd (257); a brief note on Gruffudd Hiraethog's opinion of Siôn Tudur, Wiliam Cynwal, Simwnt Fychan, and William Llyn (269); a note headed 'Edifeirwch Owain Cyfeiliog' (269-70); a copy of 'Prophwydoliaeth Gildas Brophwyd' (270-73); an incomplete series of triads entitled 'Trioedd Cerdd gwasgaredig' (273-4 ); transcripts of two stanzas of the 'tawddgyrch cadwynog' measure attributed to Iorwerth ab Ieuan and Lewys Hopcin 'o Hendre Ifan Goch' and of 'englynion' attributed to Lewys Morganwg (277-8); a short list of names of places and persons mainly from Welsh literature and legend extracted from a manuscript collection of Welsh poetry compiled by D[afydd] Jones, vicar of Llanfair Dyffryn Clwyd (279-81); a list of questions and answers headed 'Gofyniadau saith o wyr Doethion i'w gilydd a'u hattebion' (282-3); a transcript of an 'englyn' in Latin attributed to Grono Ywain (283); a series of thirty Welsh triads (284-9); a copy of a fable entitled 'Hanes y tri aderyn Llwch Gwin' (289-90; for the Welsh text see Iolo Manuscripts, p. 188, and for an English translation ibid., p. 600); copies of two prose items entitled 'Hanes y Pedwar Cefnderwydd Gwynedd' and 'Cynghor Taliesin i'w Fab Afaon' and a note re a Glamorgan tradition linking Wa[l]ter de Mapes with the parish of Llancarvan (290-92); (continued)

A note relating to Gruffudd Dwn of Ystrad Marchell and his relationship with William Llyn and William Salesbury, with a copy of an 'englyn' by the said Gruffudd Dwn to Salesbury (293-4); a note on the words 'ynad' and 'anynad' (295); transcripts of Welsh strict- and free-metre poems attributed to [Edward Williams] 'Iolo Morganwg', Hopcin y Gwaydd 'o Fargam', Thomas Llywelyn 'o Regoes', Hywel Rhys 'o Flaen Cannaid', Edward Richards 'o Ystrad Meuryg', Siôn y Cent, y Parchedig Roger Edwards 'offeiriad Llanaber yn Ardudwy', Evan Evans ( ), Edmund Prys, and Iorwerth Fynglwyd (296-317); notes relating to Elis Wynn [cleric and author] with a transcript of six of the 'englynion' published by him at the beginning of his [translation of Jeremy Taylor's Holy Living, i.e.] Rheol Buchedd Sanctaidd and of the six 'englynion' to the translator by Edmund Prys 'Ficar Clynog Fawr yn Arfon a mab yr hen Edmund Prys o Faen Twrog' also published at the beginning of the said volume (318-23); transcripts of strict-metre poems attributed to ? Ieuan ap Gruffudd, Siôn y Cent, Tomas Morgan 'o'r Tyle Garw', Wiliam Dafydd 'neu Wilym Tir Ogwr', Dafydd y Blawd, Y Bardd Glas o' r Gadair, Evan Evans 'sef Ieuan Gwynfardd Ceredigion', Goronwy Owain, Hopcin y Gweydd 'o Fargam', Huw Caerog, Huw Llyn, Huw Pennant, Wiliam Cynwal, Ieuan Tew Hynaf, Wiliam Byrcinshaw, Siôn Tudur, and Richard Dafies, Escob Mynyw, and of some unattributed verse, the poems in some instances being accompanied by notes relating to subject matter, circumstances of composing, etc. (323-57); a note relating to the grading or licencing of bards at the time of the 'eisteddfod' at Caerwys ? 1565 (357-8); notes relating to Elisabeth Price, cousin of Robert Fychan of Hengwrt [co. Merioneth], her work as a copyist of the works of Welsh poets from the earliest to her own times, some twenty manuscript volumes in her hand in the possession of the Reverend Mr. Dafis of Penegos near Machynllaith [co. Montgomery], the untrustworthy nature of the genealogical manuscripts of Gwynedd, the compilation of such works as Brut y Brenhinoedd, Brut y Tywysogion, and Brut y Saeson in South Wales, the preservation of the poetic compositions of the bards of the princes of Gwynedd in South Wales manuscripts such as Llyfr Coch Hergest, Llyfr Du Caerfyrddin, Llyfrau Gogerddan, and Llyfrau Castell Rhaglan, the use of 'Iaith Deheubarth' as a literary language by the poets of Gwynedd, etc. (359-61; see TLLM, tt. 173-4); an anecdote relating to the poet Gutto'r Glyn's visit to an 'eisteddfod' at Cardiff Castle with a transcript of an 'englyn' attributed to Syr Wiliam Herbert and of part of a 'cywydd' attributed to Hywel Dafydd ap Ieuan ap Rhys connected therewith (362-3); transcripts of 'englynion' attributed to Gruffudd ap Llywelyn Fychan and Ifan Brydydd hir (jointly), Lewis Môn, Tudur Aled, Rhisiart Iorwerth 'o Langynwyd', and Llywelyn Goch ap Meuryg Hen 'o Nannau', an 'englyn sathredig ym Morganwg', and a stanza attributed to Owen Brereton (363-5); brief genealogies of Taliesin Ben Beirdd (366); and brief genealogical and other data relating to the three bardic brothers Ednyfed, Madawg, and Llywelyn, sons of Gruffudd ap Iorwerth of Marchwiail [co. Denbigh] with reference to an 'eisteddfod' held at Marchwiail in the lifetime of the said three brothers (367-8). P. 385 is inscribed 'Brith y Coed, Rhann VI yn hwn y mae Statut Gruff. ap Cynan o Lyfr Siôn Brwynog', and pp. 387-8 contain a list of the contents of pp. 393-421 (previously paginated 1-29). Included, pagination in brackets, are prose items headed 'Llyma Saith weithred y Drugaredd yr rhai y bydd Crist ddydd brawd yn holi pob Criston yn galed am danynt' and 'Llyma beth o Gynghoreu Cattwn Ddoeth a'r Bardd Glas o'r Gadair i bob gwr doeth ar y fynno rengi bodd Duw a dynion . . .' (393-9); a short list of 'Geiriau gwir Taliesin' and a series of six Welsh triads (400); a series of sayings attributed to Y Bardd Glas o'r Gadair, and a sequence of questions and answers of a biblical - mythological nature (401-02); and transcripts of strict-metre poems attributed to Gutto'r Glynn, Iorwerth Fynglwyd, Dafydd Na[n]mor, Meilir Brydydd, Dafydd ap Gwilym or Iolo Goch, and Llawdden or Gwilym ap Ieuan hen (403-21). The remainder of the volume contains, pagination in brackets, a copy of rules relating to the holding of 'eisteddfodau' and of a version of the statute for the regulating of the bardic order attributed to Gruffudd ap Cynan as allegedly confirmed at the [mid] fifteenth century 'eisteddfod' held at Carmarthen (425-37; the present version, according to notes On p. 437, had been compiled by Siôn Brwynog from various sources and had been transcribed by [Edward Williams] 'Iolo Morganwg' from one of the manuscripts of the aforementioned Elizabeth Price in the possession of the Reverend Mr. Dafies of Penegos aforesaid); a note by [Edward Williams] 'Iolo Morganwg' relating to the authorship of the aforementioned rules for holding 'eisteddfodau' (438; see TLLM, t. 281); notes relating to an 'eisteddfod' held at Y Pil in co. Glamorgan in 1715 listing the names of bards who ? were present and containing transcripts of 'englynion' composed at or in connection with the said ' eisteddfod' allegedly by Nicolas Rhys, Wil Hopcin, Siôn Bradford ('Ieuan Tir Iarll'), Dafydd Hopcin 'o'r Coetty', Dafydd Nicolas, Gruffudd ap Hywel ('Y Digri Bach'), Rhys Morgan, Siôn Rhydderch, and Dafydd Thomas (441-6; see TLLM, tt. 258, 277 et seq.); a further note relating to the aforementioned Dafydd Thomas who was at Y Pil including a reference to Siôn Rhydderch (446-7; see TLLM, t. 244); and what appears to be the superscription for proposed notes on an 'eisteddfod' held at Ystrad Ywain in co. Glamorgan in May 1720 (448).

A manuscript containing poetry in praise of Gruffydd Dwnn, the bulk of it being in the autograph of Gruffydd Dwnn, though pp. 12 (Rhisiart Fynglwyd), 19 ('Syr John Teg'), 22 (Sion Brwynog), 41, 69, 108, 120 (Syr Owain ap Gwilym), 73, 74 (Morgan Elfael), 132c (Huw Llŷn), and 145 (unattributed, possibly autograph) are autograph works by the respective authors. Many of the poems are dated. Pp. 147-156 are in the holograph of Huw Llŷn (see notes on pp. 149, 153). P. 17 is inscribed 'ai kant pan oeddid yn kwplav y plas [nyr ystrad merthyr] o. k. 1533'. An inscription on p. 49 notes Syr Owain ap Gwilym as being 'ap Ieuan o dal y llynn' and, in relation to the poem, 'ai gwnaeth i ryffydd dwnn o hiraeth am rvffydd ag o eisse i weled ac ai danovones ynysgrifenedig i ryffyth donn' (see Peniarth MS 70, which evidently once belonged to the Gruffydd Dwnn Collection). P. 77 is inscribed probably in the hand of Gruffydd Dwnn (relating to the date 1533) 'pan oedd rys [the eldest son of Gruffydd Dwnn] yn 11 mlwydd oed. I mayr kywydd hwnn yn ysgrifenedig mywn llyfr arall i ryffydd Dwnn kyfaillt y llyfr hwnn'. On p. 83 the name of 'syr John teg' has been crossed out and that of 'Gyttvn Owein' [Gutun Owain] substituted, though Gutun Owain was dead long before the poem's date of 1526; the text, however, appears to be in the autograph of Gruffydd Dwnn. The last line of the poem beginning at p. 87 may not belong to the first as pp. 89-90 are missing. P. 104 is inscribed, apparently in the hand of Huw Llŷn in relation to the author of the work, Morus Dwyfech, 'ai kant pann oedd o. k. 1560 ac ynn hir llyn i gwnnaeth ef y ddau englynn hynn'. P. 126 is inscribed in the hand of Gruffydd Dwnn 'I mayr varnad honn yn ysgrifenedig yn y llyfr lle may englynyon yr eryr o law y gwr ai gwnaeth yr hwn lyfr a wnaeth gryffydd dwnn iddo i hyn yn gyntaf oll ond vn llyfr arall'. P. 144 is inscribed in the hand of Gruffydd Dwnn 'gyttvn owein ai kant i ryffydd dwnn' (although, according to the date of the poem, Gruffydd Dwnn was an infant at the time of its writing). P. 147 is inscribed (in relation to Wiliam Cynwal, the author of the englynion) 'a Gant y chwech englyn hynn yni ynnwedic lythr at ruffudd dwnn 1566' (only the fifth and sixth englyn of this series remain).
This is one of the manuscripts mentioned in Mostyn MS 184. Gwenogvryn (J. Gwenogvryn Evans, Report on Manuscripts in the Welsh Language, vol. II, part II (London, 1903), p. 503) debates whether the englynion addressed to 'Gr: Dwnn o Gydweli' on at pp. 132-132b are in the hand of Owain Gwynedd.

A manuscript containing Welsh laws and pleadings. There is a pen and ink sketch of a plough on p. 105. The margins of pp. 38-95 contain index words to the subject-matter in the autograph of William Salesbury, as in Mostyn MS 159, to which pp. 123-124 belong. At the foot of pp. 123-124 there are notes in the hand of Gruffydd Dwnn. There is also an englyn attributed to Iolo Goch in the hand of William Salesbury at the top of p. 72. The contents of the remainder of this manuscript consist of excerpts, as well as some later pleadings (e.g. p. 42). At p. 123 is a fragment of the Grail, being two columns of Mostyn MS 159.
From the invocations 'Gwenoc' (pp. 76, 112), 'Gwenod : Gwnnen' (pp. 56, 110), 'Gwenoc : Gwnen : Gwinionyd' (p. 111), and 'Gwenoc : Gwnen Gwinionyd ywch kerdin' (p. 120), it is inferred that this manuscript was written in the parish of Llan Wenog, Cardiganshire, or by a native of that parish, and the text furnishes an interesting specimen of the dialectical peculiarities of south Cardiganshire. Llanwnnen is an adjoining parish to the north-east. Both Llanwenog and Llanwnnen parishes were in the upper division of the ancient lordship of Gwynionydd. Castell Gwynionydd is supposed to have been on the summit of Côd y Vôl, near Llandysul, where the river Cerdin falls into the Teifi a little north of the church. The text of pp. 1-38 corresponds practically with pp. 464-588 of the 'Dimetian Code' in vol. i of The Ancient Laws & Institutes of Wales. The text at pp. 51-56 of this manuscript corresponds to pp. 366-378 of Volume ii of The Ancient Laws & Institutes of Wales, pp. 73-74 to pp. 122-124 and 152, and pp. 96-97 to p. 342.