A composite volume containing transcripts of Welsh free- and strict-metre poems in the hand of Edward Williams ('Iolo Morganwg'). Pp. 23-398 contain Welsh strict-metre poems, mainly in the form of 'cywyddau', attributed to Syr Gruffudd Fychan, Lang. Lewys, Siôn Dafydd Las . . . 'o Lanuwchlyn', Gwilym ap Ieuan Hen, Siôn Cent, Simwnt Fychan, Siôn Philip, Dafydd ap Gwilym, Llawdden, Dafydd Llwyd ap Llywelyn ap Gruffudd, Huw Machno, Iolo Goch, Gruffudd Dafydd ap Hywel, Edward ab Raf ab Robert, ? Dafydd o'r Nant sef Dafydd Wiliams, offeiriad Llanfrynach ym Morganwg, ? Dafydd Nanmor, Edmund Prys, Syr Siôn Leiaf, Tudur Penllyn, Wiliam Llyn, Madog Benfras, Llywelyn ap Meredyth ap Ednyfed sef Lle'n Llogell 'o Farchwiail', Rhys ap Dafydd Llwyd ap Llywelyn Llygliw, Rhys Goch 'o Eryri', Ieuan Gethin ab Ieuan ab Lleision, Thomas ab Ieuan ab Rhys, Casnodyn Fardd, Gutto'r Glynn, Iorwerth Fynglwyd, Wiliam Egwad, ?Rhys Brydydd 'o Dir Iarll', ?Rhys Du Brydydd, Ieuan Tew Ieuanc, Syr Thomas Jones 'o Lan Deilo Bertholeu', Lewys Morganwg, Tomas Lewys . . . 'o Lechau ym Mhlwyf Llanhari', Thomas Llywelyn 'o Regoes', ? Syr Dafydd Llwyd Llywelyn, Sippyn Cyfeiliawg, Hywel Llwyd, Lewys Glynn Cothi, Ieuan ap Hywel Swrdwal, Gruffudd Vychan ap Gruffudd ap Ednyfed, Siôn ap Howel ap Llywelyn Fychan, Lewys Môn, Richard Philip, Siôn Dafies, person Garthbeibio, sef y Dr. Dafies o Fallwyd, Rhys Llwyd ab Rhys ab Rhiccert, Llywelyn Moel y Pantry, Dafydd Benwyn, Gruffudd Llwyd ap Gronw Gethin, Owain ap Siôn ap Rhys, Huw Cae Llwyd, Grufludd Hiraethog, Cadwaladr ap Rhys Trefnant, Siôn ap Hywel Llywelyn Fychan, Deio ap Ieuan Du, Rhys Nanmor, Ieuan Tew Hynaf, Rowland Fychan 'o Gaergai', ? Rhisiart Iorwerth, Rhys Cain, Rhys Meigen, Thomas Carn, ? Hywel Dafydd ap Ieuan ap Rhys, and Thomas Lewys 'o Lechau Llannwonno'. There are occasional annotations by [Edward Williams] 'Iolo Morganwg' and the 'cywydd' attributed to Casnodyn Fardd (pp. 127-32) is followed (pp. 133-4) by notes mentioning a Glamorgan tradition which linked the name of that poet with the origin of the 'cywydd' measure. Pp. 236-8 contain a first-line index to the poems on pp. 239-360. Pp. 399-546 are devoted to poems attributed to Siencin Lygad Rhawlin, Dafydd o'r Nant, Hopcin y Gweydd 'o Fargam', Thomas Llywelyn 'o Regoes', Syr Tomas Jones, ofleiriad Llandeilo Bertholeu, Syr Huw Dafydd 'o Gelli Gaer', Rhys Goch o Dir Iarll ab Rhiccert ab Einion ab Collwyn (twenty poems), Hopcin Twm Philip 'o'r Gelli Fid', Syr Siôn ap Morys, Siôn Lewys Richard 'o blwyf Llangrallo', ? Ifan Huw 'o Ystrad Owain', Dafydd Nicolas 'o Aberpergwm', ? Huw Llwyd 'o Lancarfan', ? Twm ab Ifan ab Rhys, Hywel Llwyd 'o Lancarfan', Wil Tabwr, Gronw Wiliam, Morgan Pywel, Gwilym Tew, Thomas Morgan 'o'r Tyle Garw', Edward ab Efan 'o Benn y Fai', Llywelyn ab Hywel ab Ieuan ap Gronw 'o Lantrisaint' alias Llelo Llantrisaint, Thomas Llywelyn, ficar Llancarvan, Edward Matthews . . . 'o blwyf Llangrallo', and Sioni'r Maeswn Dimmai. There are occasional notes by [Edward Williams] 'Iolo Morganwg' and p. 419 contains a list of the titles of the twenty poems attributed to Rhys Goch ab Rhiccert (pp. 421-54 ). A square slip of brown paper inscribed 'Hen Garolau a gasglwyd yng Ngwynedd' has been pasted on to p. 547 and this is followed on pp. 551-610 by a series of thirty numbered 'carolau' the majority unattributed and some attributed to Huw Dafydd, Thomas Evans, Syr Lewys ab Huw, Llywelyn ab Hywel ab Ieuan ab Gronw, Llywelyn ab Hwlcyn 'o Fôn', Dicc Hughes, R. Hughes, and Richard Hughes (? whether the last three named were the same person). Pp. 611-33 contain three poems two of which are attributed to Huw ap Wiliam ap Dd. ap Gronw and Siôn Morys.

An incomplete volume (ff. 1-85, 176-243) consisting largely of cywyddau and englynion by Sion Kent, Sion Tudvr, Grvffydd Grvg, Meredith ap Rees, Will'm ap Sion ap D'd, Gruff' Hiraethog, Will'm Llynn, Huw Arwistl, D'd ap Edmwnd, D'd ap Gwilim, Rob't Leiaf, Rys Goch or Yri, Mastr Hari, Ifan Tew Brydydd, Gytto Glyn, Sion Philipp, Roger Kyffyn, Ievan Fychan, Sr. Davydd Trevor, Tudur Penllyn, Rowland Fychan, Tomas Prys, Evan Tudvr Owen, Ievan Brydydd Hir, William Elias, Tudur Aled, Gruff' ap Ievan, Rys Pennarth, Bedo Aerdrem, Bedo Brwynllys, Iolo Goch, Ellis Rowland, Howel ap D'd ap Ievan ap Rys, D'd Namor, D'd Ddv o Hiraddvc, Lewys Glyn Kothi, Howel ap Ievan ap Rys, Owen Gruffydd, Michael Prichard, Edmwnd Price, Hughe ap Ed'd Lloyd, Rice Kain, Richard Hughes, [Richard Davies] 'Escob Dewi', Ed'd Maelor, Ievan ap Tudvr Penllyn, Harrie Howell, Sion Kain, and Robin Ddv. Towards the end of the volume there are short texts such as englynion in Latin, 'llyma gas bethav Owain Kyveiliog', 'xxiiij gwell', 'Geirie gwir Taliesin', triads, proverbs, the nine grades of kinship, medical recipes, 'Llyma henwau y pedair Caingc ar ddeg Cydwgan a Cyhelyn', and 'Henwau'r pedwar Gosdeg Cerdd dannau'. The greater part of the manuscript was written in the seventeenth century; but there are additions and marginal notes to the nineteenth century. There is an index ('Tabl y llyfr') to ff. 1--76, in a seventeenth century hand. Between ff. 4 and 6 are inserted two leaves (pp. 129-30, 135-6) of David Jones (Trefriw) (ed.): Cydymaith Diddan (Caer Lleon [1766]).