The original manuscript of a religious tract enititled 'Traethawd ynghylch Taledigaeth am bechodau trwy Haeddiant Crist' by Thomas Evan(s) ('Tomos Glyn Cothi'). The manuscript was written in 1790, and completed on 11 September of that year. The author has also added a supplement (Ychwanegiad i'r Traethawd blaenorol') (6 pp.), dated after 1811. Inset are press cuttings in connection with the meetings held at Gwernogle, Carmarthenshire, in 1933 to celebrate the centenary of the death of 'Tomos Glyn Cothi'.