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.