Ffeil NLW MS 21368B. - Triads and Bardic Institutes,

(a) A notebook (8 pp., in Welsh) containing 'Trioedd y Lladron', twelve in number, 'o Lyfr Thomas Philip o Dreos', in the autograph of Iolo Morganwg, followed by 'Credo Wladwriaethol' written in another hand; (b) The Bardic Institutes in the autograph of Iolo Morganwg (in English): (i) '[The] Bardic Institution according to [the] Laws of Gruffydd ab Cynan'. A note at the end states that this is an abstract of the Institutes as given by Dr John David Rhys in his Welsh Grammar, 1593; (ii) 'The Bardic Institutes as Traditionally retained down to the Present Day, by the Glemorganshire Bards who assert, and believe that they are unalteredly the same with those of the Ancient British Bards and Druids'.