A manuscript in the hand of Moses Williams containing 'Kelvyddyd kerdd Davod' (ff. 1-5a), being a copy of pp. 10-16 of Llanstephan MS 28, with a note stating that 'This imperfect Tract I transcribed out of a MS. writ by Guttyn Owain A.D. 1455 & communicated to me by D Foulkes of Llanbedr Dyffryn Clwyd.'; and an extract 'Out of Huw Machno's Book' (ff. 5b-12b) outlining the fifteen faults which may be committed when writing Welsh verse, with examples. The text cites a line from Wiliam Cynwal.
A manuscript in the hand of Moses Williams containing the Interpretation of Dreams from Llanstephan MS 28; and 'Gr. ap kynan twssog kymry a wnaith gyfreth ar y gwyr wrth gerdd' in a seventeenth century hand.
A manuscript containing lives of saints, etc. An index is included on p. i. Pp. i, 427-433 are in the hand of Moses Williams. A note - 'Pretium £1 . 4 . 6 An. 1715' - on the fly-leaf is in the same hand as most of the manuscript. At the end of the Life of St Margaret, which begins at p. 427, the scribe has written 'Felly y terfyna buchedd saint y Marged a esgrifenodd Tho: Evans 1628 fis Mawrth 5 dydd'.
A manuscript containing Brut y Brenhinedd, after 'Ifan Llwyd ap Dafydd o Nantmynach o fewn Sir Feirioydd [sic], Esquier'. Pp. 1-9 are in the hand of the Reverend Moses Williams.
A manuscript divided into three parts containing triads collected by Moses Williams, with Prefaces, etc., prepared for publication. At the beginning of the volume are notes, including directions to the printer, a list of subscribers [1717], etc. There then follows the first part of the manuscript (paginated 1-98) containing a collection of the 'historical' triads, with variant readings from 'B.B. of Carm., R.B. of Hergest, Cwtta Cyfarwydd, Rich: Wynne of Gwydr's MS., Dr. Foulkes's Book', together with two version of transcripts by Moses Williams ready for the printer, with a preface in Latin. The second part of the manuscript (paginated 1-112) contains 'moral' and other triadic sayings. The third part of the manuscript (paginated 1-74) contains 'proverbial triads', followed by a translation into Latin. The contents of parts two and three of the volume are to be found in the Myvyrian Archaiology of Wales.
A manuscript in the hand of Moses Williams containing a pedigree of the saints. The text beginning at p. 13 is copied from Bib. Harleian MS 95 A. 16; the text beginning at p. 21 is copied from Jesus College MS 3, p. 34.
A manuscript in the hand of Moses Williams (pp. 1-4) and another (pp. 5-66) containing a transcript of Kulhwch ac Olwen and of Y Mabinogion from the Red Book of Hergest.
A manuscript in the hand of Moses Williams containing 'Prawf fod Degymmeu yn ddyledus wrth Ordinhad Duw', being a translation into Welsh. A note by Moses Williams states: 'Gorphènwyd ei gyfieithu y 19 Chwefror 1720/1'.
A manuscript containing a Welsh grammar. A note in the hand of Moses Williams reads: 'This copy is out of a MS. lent me by R. Mostyn of Penbedw Esqr., which MS. formerly belong'd to Thomas ap Ivan of Hendre Forfydd [i.e. Peniarth MS 157]. Twas compared with the said MS. 29 Julii 1717 ... Twas also collated with another copy that was once in the possession of Huw ab Owen alias Huw Machno.' There are notes by Moses Williams on the text throughout the volume.
A manuscript containing Welsh laws (pp. 1-96) and the 'Elucidations' (pp. 97-535), written in the hand of John Jones, Gellilyfdy prior to 25 September 1619 (see pp. 67, 535). Where the text is imperfect Moses Williams has written its contents in the margins. The text of pp. 1-96 of this manuscript corresponds with that of Peniarth MS 29, pp. 1-51, while the remainder may be a copy of Peniarth MS 278. The original of pp. 97-535 was either imperfect or frequently illegible as dots indicating lacunae are frequent. Much of the matter of this second part is the same as the 'Elucidations' in Ancient Laws and Institutes of Wales, Vol. ii, Book XIV. The text ends abruptly at the beginning of the sixth line on p. 535.
A manuscript containing the Mabinogion (pp. 1-64); the Dream of Maxen Wledic (p. 65); the Adventure of Llvdd and Llevelys (p. 74); and the History of Kulhwch and Olwen (pp. 81-120). The text was transcribed from the Red Book of Hergest and collated by Moses Williams.
