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.