reverted to that of his only brother, Tudor ap Griffith Vychan, a witness, as "Tudor de Glyndore," in the Scrope and Grosvenor controversy, 3rd September, 1386, and then twenty-four years and upwards, who is stated to have been killed under Owen's banner at the battle of Mynydd Pwll-Melyn, near Grosmont, Monmouthshire, fought 11th March, 1405. Tudor's daughter and heir, Lowry [Lady] of Gwyddelwern in Edeirnion, "una Baron. de Edurnyon," became the wife of Griffith ap Einion of Corsygedol, living 1400 and 1415; and from this marriage descend the eminent Merionethshire House of Corsygedol (represented by the co-heirs of the late Sir Thomas Mostyn, Bart., of Mostyn and Corsygedol; namely, his nephew, the Honorable Edward Mostyn Lloyd Mostyn, of Mostyn and Corsygedol, M.P., Lord Lieutenant of Merionethshire, and Sir Thomas's sister, Anna Maria, Lady Vaughan, mother of Sir Robert Williames Vaughan, Bart., of Nannau) and its derivative branches, the Yales of Plas-yn-Yale, co. Denbigh, and the Rogers-Wynns of Bryntangor in the same county; the former represented by the Lloyds of Plymog, and the latter by the Hughes's of Gwerclas in Edeirnion, Lords of Kymmer-yn-Edeirnion, co. Merioneth, and Barons of Edeirnion. These families, co-representatives of the three Cambrian dynasties, all quarter, with the arms of South Wales and North Wales, the ensigns I have referred to as the hereditary bearings of the Lords of Glyndwrdwy. Independently of the adoption of these ensigns in the Welsh MSS. in the British Museum, College of Heralds, and other depositories, it may be mentioned that they are quartered in an ancient shield of the Vaughans of Corsygedol, suspended in the hall of Corsygedol,--one of the finest and most picturesque mansions in the Principality,--and that they appear in the splendid emblazoned Genealogy of the House of Gwerclas, compiled in 1650 by Robert Vaughan, Esq., of Hengwrt, the Camden and Dugdale united of Wales.[7] The arms in question are ascribed to the line of Bromfield and Glyndwrdwy, and, as quarterings to the families just named, by Mr. Burke's well-known _Armory_, the first and, indeed, only work, in conjunction with the Welsh genealogies in that gentleman's _Peerage and Baronetage_, and _Landed Gentry_, affording satisfactory, or any approach to systematic and complete, treatment of Cambrian heraldry and family history. Mr. Charles Knight also, highly and justly estimated, no less for a refined appreciation of our historic archæology, than for careful research, adopts these arms as the escutcheon of Owen in the beautiful artistic designs which adorn and illustrate the First Part of the drama of _King Henry IV._, in his Pictorial edition of Shakspeare. (_Histories_, vol. i. p. 170.)