A composite volume containing miscellaneous material in the hand of Edward Williams ('Iolo Morganwg'). Pp. 37-146 contain an 'interleaved' copy of a Welsh chronicle recording the activities of the Welsh princes, etc., 1101-1055. This appears to be a 'variant' copy of a version of part of the Welsh chronicle known as 'Brut y Tywysogion', and, in a note at the end (p. 146), the work is linked with the name of Caradog of Llancarfan ('Ac yn yr amser yma y darfu i Garadog o Lancarvan (a fernir gan bob gwr dysgedig yn yn (sic) awdur yr hanes honn) orphen Prydieu Tywysogion Cymru o Gadwaladr hyd ei amser ef'). Pp. 149-231 contain a series (interleaved) of one hundred and twenty-six English triads with the superscription 'The Triades of the Island of Britain or the Triades of Historical Tradition and the Knowle[d]ge of Events, Occurrences, persons, and other things that have been remarkable in the Island of Britain, and of accidents that befell the Nation of the Cimmeri in very remote ages . . .'. This is a translation of the series of Welsh triads published in The Myvyrian Archaiology of Wales . . . (London, 1801), vol. II, pp. 57-75, a series which, according to a note at the end (Myvyrian, p. 75), also translated into English at the end of the present series, was compiled by Thomas Jones of Tregaron ['Twm Shon Cati'] in 1601 from the books of Caradog of Llancarfan and Ieuan Brechfa. P. 237 contains a list of the names of twelve series of Welsh triads and an 'englyn' by [Edward Williams] 'Iolo Morganwg', and is followed (pp. 239-86) by several series of Welsh triads including series with the superscriptions 'Trioedd Barddas a elwir Trioedd Ionabwy' (see John Williams: Barddas . . ., vol. I, pp. 376-9), 'Trioedd amrafaelion', 'Trioedd Bonedd', 'Trioedd Beirdd', 'Trioedd Cyfarwyddyd', 'Llyma Drioedd Cerdd Gruffudd ab Cynan, Trioedd Llawdden Fardd medd llyfrau eraill', 'Llyma Drioedd eraill a gofyn ar Fardd eu gwybod . . .', and 'Llyma Drioedd Cerdd a elwir Trioedd Llogell Rhison (sef Trioedd Marchwiail) a ddangoswyd ger bronn yr Eisteddfod fawr a fu yng Nghaerwys yn 1567 gan Feirdd Gwynedd . . .'. Also included in the volume are p. 13, a genealogy, in direct male line, of Iestyn ab Gwrgan [lord of Glamorgan, fl. 1081--1093], and p. 14, a brief chronicle of events in South Wales during the years 1001, 1085, 1161, and 1184.