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 in the hand of Evan Evans containing poetry mostly derived, indirectly, from the Black Book of Carmarthen (Peniarth MS 1) and the Red Book of Hergest (Oxford, Jesus College MS 111). A table of contents, in a later hand, is on pp. 179-180.
This transcript was adopted by the editors of the Myvyrian Archaiology of Wales for their text or for their notes.

A manuscript in the hand of Evan Evans (Ieuan Fardd) containing a Welsh Grammar, consisting of 'Pymp Llyfr Cerddwriaeth' (pp. 1-101) and 'Trioedd Cerdd' (pp. 102-115).
At the end of the volume is a note by Evan Evans stating 'Y Gramadeg uchod a fenthygiwyd gennyfi Evan Evans offeiriad y gan y Parchedig Mr. Robert Nannau Periglor Llan Fwrog, a yscrifenwyd gan Robert Fychan or Hengwrt ag a ddatscrifennwyd ... yn 1784'.

A manuscript containing ''The Art of Contentment' or Addysc i foddlonrwydd', translated into Welsh apparently by 'Nathanael Jones Esq. anno ætatis suæ 57' (p. 130).

A manuscript containing 'Taylors Daily Rule in Welsh' rendered by 'Nathanael Jones'.

A manuscript in the hand of John Jones, Gellilifdy, who in turn had copied from a manuscript dated 1531 (see f. 20), containing 'Ymddiddan rwng y verch aniwair ar gwr ieuangc o waith Grasmws o Rodam', and the Elucidarium.

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.

A manuscript containing poetry by Dafydd ap Gwilym, Guto'r Glyn, Dafydd ab Edmwnd and others (pp. 1-102 (the text beginning at p. 99 being a fragment only)); and Myrddin's 'Vaticinium' (pp. 131-146).
The manuscript is written in three different hands: pp. 1-102 belong to the third quarter of the sixteenth century; pp. 103-130 to the fourth quarter of the sixteenth century; and pp. 131-146 are in the hand of Sir Thomas Wiliems in his earliest style, c. 1576.

A manuscript containing poetry of Taliesin, Iolo Goch, Edmwnd Prys, Dafydd ab Edmwnd, William Phylip and others.
The manuscript is written in many hands but mostly in that of T. Jones of Pennant Melangell (see p. 222), c. 1680 (see pp. 76, 81).

A manuscript containing Brut y Tywysogion. Ff. 1-111, 114-121 are in the autograph of Richard ap John of Scorlegan, Llangynhafal.
The text is a copy of Mostyn MS 116 when that manuscript was complete.

A manuscript containing poetry by Bedo Brwynllys, Dafydd ab Edmwnd, Dafydd ap Gwilym and others in the hand of Samuel Williams.

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 manuscript entitled 'Dyfrif Achwyniad ar y tosdurus Sarrhâd o Ymadrodd Halogedig mewn Cymdeithas'.

A manuscript in three parts: (i) 'Catechism Eglwys Loegr wedi ei amgylchieithu'; (ii) 'Gwrth-ddadleu yn erbyn y Catechism wedi eu hatteb'; (iii) 'Gweddiau boreuol'.

A manuscript containing 'cywyddau' of Dafydd ap Gwilym.

A manuscript, in several hands, containing the poetry of Wmffre Dafydd ab Ifan and others, including Siôn Tudur, Siôn Phylip, Rhys Cain and Dafydd ap Gwilym.
Pp. 1-62 are said to have been written in 1691 by Siôn Rhydderch (John Roderick) of Cemaes (see p. 62); pp. 63-77 are in an earlier hand; and pp. 79-82 are in the hand of Dr John Davies, Mallwyd.

A manuscript in two hands containing mainly poetry of Taliesin, Iolo Goch, Dafydd ab Edmwnd and others; also pedigrees of British rulers (pp. 6, 14-27, 29), which include englynion chronicling the history of British rulers from Brutus (pp. 16-22).

A manuscript in the hand of the Reverend Samuel Williams, Llangynllo containing Gildas's 'De Excidio Brittanie' in Latin and Welsh on opposite pages.

A manuscript, apparently in the hand of John David, containing a transcript of Rawlinson MS C. 821 (pp. 1-107); 'Am ossodedigethau Dyfnwal ... moel ...' (pp. 109-110); excerpts, in Welsh, from a very old manuscript of the Laws which was in the possession of John Edwardes of Chirk (pp. 111-128); 'a lettre & exposition of Welsh words in Hoel Da's lawes written to Mr. ffr. Tate [Francis Tate, who has a note dated 23 January 1613 at the end of Vesp. E. XI] ...' (pp. 129-131); and 'The exposition of words' (pp. 132-148).

A manuscript containing the laws of Hywel Dda 'o Lyfr Wm. Philips o Aberhodni [?Aberhonddu]'.