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 in the hand of Moses Williams containing Triads and Gorwynnion from the Red Book of Hergest, Englynion y Clywaid from Jesus College MS 3, and XIII Tlws.
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, 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 a transcript of the 'Cornish Vocabulary' in MS Cotton Vesp. a. XIV, followed by 'the same reduced into alphabetical order and compared with the Welsh' (ff. 1-48); and Wiliam Llŷn's 'Glossary' from MS Cott. Vesp. E. IX, followed by 'The same Alphabetically digested.'
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 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 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).
A manuscript containing the laws of Hywel Dda in Welsh. A note in the hand of Moses Williams reads as follows: 'The original MS. (Bibl: Cott: Titus D. IX) whence this was copy'd from was lost in the fire A.D. 1731. So this is the only perfect Copy of this class'.
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 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.