A manuscript volume, written throughout by William Owen [-Pughe], containing transcripts, probably from 'Llyfr Coch Hergest', and English translations of 'Pwyll Pendefig Dyfed' (pp. 11-79), 'Branwen ferch Llyr'(pp. 80-153), and 'Manawydan fab Llyr' (pp. 154-217), with the beginning only of 'Math fab Mathonwy' (pp. 218-223). Among miscellaneous entries at the end of the volume are: a list of the descendants of Morien Glas (p. 224); couplets from the works of Guto y Glyn, Mathew Brwmfild and Rhys Penarth (p. 226); a synopsis of the tale of 'Branwen ferch Llyr' (pp. 227-228); 'Names among the Lakes of Cumberland Westmoreland and Lancashire - Wordsworth's Scenery' (p. 232); and the note: 'Cyrhaeddwn dy y P. W. Coxe, Bemerton, D. Llun, July 26, 1802, gan gerdded D. Sul o Southampton i Gaer Sallawg i gysgu' (inside back cover).