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 containing 'Kyngor Katw ddoeth ar Bardd glas', being a transcript by Samuel Williams of a manuscript written in 1604 by John Jones, Gellilyfdy.
A manuscript containing a copy of Aristotle's Book of Physiognomy (originally written by Aristotle for Alexander the Great) (ff. 1-9) (cf. Jesus College MS 7, p. 48); material relating to astrology (ff. 10-26); and Traethiad Robin Moyses (ff. 26-28). The two works contained in ff. 1-19 are copied from a manuscript written by John Jones, Gellilyfdy in 1604, which was copied by Jones from a manuscript written in 1476.
A manuscript, mainly in the hand of James Davies ('Iaco ab Dewi') of 'Trerhedyn yn Llan Llawddoc' and completed 15 July 1713 (see p. 30), containing 'Meddygon Myddfai', being a transcript from the Red Book of Hergest, Col. 928. The manuscript is interleaved throughout, and passages of the text are translated here and there on the interleaves by Moses Williams.
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 containing medical recipes, lists of names of medicinal plants, etc. Much of the text agrees practically with that of the Meddygon Myddfai, but the order is quite different, and the wording varies also.
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 containing dated extracts from Brut y Tywysogion (pp. 1-16); and a chronological table 'out of Sir Tho. S. Sebright's MS. No 13. Ex libro D'ni Jo. Prise Militis'.
A manuscript containing the Welsh laws, described as being 'Variantes Lectiones & Addidamenta Ex Codd. MSS. Gul. Williams Baronetti'. The volume also includes a list of the subjects contained in Llyfr Gwyn Hergest (the White Book of Hergest) (p. 38, part i) and in 'Oes Gwrtheyrn Gwrtheneu' from Llyfr Coch Hergest (the Red Book of Hergest); together with a copy of Mostyn MS 136, pp. 1-44.
A manuscript in the hand of Moses Williams containing 'A transcript of an ancient MS. of Cyfraith Howel Da communicated to me by Mr. Wm Baxter, A. D. 1714 ...sold afterwards to the Earl of Oxford' (pp. 1-60); ' A transcript of Cyfraith Hywel [from Bibl. Harleian MS 63 B.]' (pp. 69-199); 'A transcript of an old Latin Copy of Cyfraith Hywel' (pp. 205-231); a transcript 'Ex Llyvyr Koch Hergest col. 1032' (p. 233); 'Statuta Walliæ (Eleod: MS. cui Tit. Liber Memorandorum Ecclesiæ Conventualis de Bernewelle) Anno 1284' (pp. 235-262); 'Howel da mab kadell &c. from 'Cleopatra A. XIV. Membr. Cott. 6' (pp. 269-349); 'A Transcript of c. Hywel taken out of ... Caligula A. III. 3 . / 1713. Cott. 2' (pp. 356-392; and fragments of texts (pp. 396-429).
