A composite volume, mainly in the autograph of Evan Evans (Ieuan Fardd), copied from manuscripts of Lewis Morris and others 'ynghylch y flwyddyn 1765' (p. i), including 'Englynion y Beddau' (pp. 1-15) and 'Englynion y Clywed' (pp. 15-28); 'Gildas Nennius' (pp. 49-60). The second part (ff. 1-35) contains 'Hanes Taliessin' (pp. 61-69); genealogies taken from a manuscript of Robert Vaughan, Hengwrt (pp. 80-89); extracts from Dares Phrygius, Brut y Brenhinedd and Brut y Tywysogion (pp. 97-101); Bonedd y Saint (pp. 109-115); 'Hanes yr ymrysson rhwng Edmund Prys a W. Cynwal' (pp. 117-123); notes and extracts; etc.
A letter, 7 December 1758, from Lewis Morris, Penbryn, to Evan Evans, Llanllechid, is tipped into the volume (pp. 135-138).

A manuscript, 'ex Autographo D'ni H. Salesbury de Llan rwst penes dnm R. Salesbury de Rug', containing pedigrees and poetry.
Pp. 1-22 are in the hand of David Parry, and pp. 23-36 probably also in his hand. The poets cited include Taliesin, Sion Tudur and Dafydd ab Edmwnd.

A manuscript written c. 1634 (see p. 165) containing pedigrees (pp. 164-166, 189-215, 217-243); Bonedd y Saint (pp. 87, 216); 'Dosbarth Arveu' (pp. 167-188); proverbs (pp. 160-162); triads (pp. 259-260); 'Cantrevyd a chymydeu Cymru' (pp. 244-245); medical recipes (pp. 249-258); &c.
The manuscript is in the same hand as Llanstephan MSS 122-125 and may be that of John Pryce, rector of Mellteyrn (see p. 103).

A manuscript in the hands of the Reverend Samuel Williams, Moses Williams, Iaco ab Dewi and others, containing one hundred and sixty-eight numbered items, mainly poetry, including about two hundred and thirty-five triads (item 13). The poets cited include Taliesin, Bleddyn Fardd, Iolo Goch, Dafydd ap Gwilym, Siôn Cent and Siôn Phylip. Item 165 contains a genealogy of Welsh saints. Item 166 is a copy of cols 1165-1169 of the Red Book of Hergest. Item 167, which contains englynion, is in the hand of Edward Lhuyd, and was 'sent through the post to W. Baxter in Totnham Highcross near London'. Item 168 is a piece entitled 'A true Character ... of the Gentry within the Counties of Carmarthen, Pembroke and Cardigan during the Commonwealth'.

A book of South Wales pedigrees, [c. 1592], written in two distinct hands.
The manuscript also contains the tract known as 'Bonedd Saint Cymru' (f. 48 verso).

A composite volume, in the hand of Evan Evans, containing notes on Nennius and Gildas, which include twelve triads in Welsh, copies of letters to Archbishop Ussher from Robert Vaughan, Edward Brownker and Gerard Langbaine, together with extracts from a letter from Archbishop Ussher to William Camden (ff. 1-89); pedigrees of rulers and saints (ff. 92-121, 124-132), with copious notes regarding the sources of the texts; poetry by Guto'r Glyn (f. 122); a copy of a charter of Rhos Fynach, Conwy (ff. 145- 147); etc.