from a footnote, which is difficult to read in the Google Books digitization:
Richard ap Howel was a partisan of Henry VII, who, when Earl of Richmond, was concealed at Mostyn Hall; and after he became King, sent the sword and belt he had worn at the battle of Bosworth to Richard ap Howel, as an acknowledgement of the kind services he had rendered him. The Cedwyn MS. before referred to has the following note: -- "The mansions and possessions which descended to the said Richard ap Howel ap Ieuan Vychan, and the [...] of them -- 1. The First Court called Pengwern, in Chirkland, being part of the possessions of the aforesaid Adda ap Ierworth Dda, and Elizabeth his wife, who was daughter of Gruffydd Vychan, ap Gruffydd, of Rhuddalt, which Elizabeth was whole sister to Owen Glyndwrlwy; she was also the mother of Ievan ap Adda, ap Ierwerth dda, -- II. The Second Court was Tref Casell, in Môn, in the Hundred or Cwmwd of Tiedaethwy, and Tref Gwehelyth in the Cwmwd of Lliwon, and was part of the possessions of Angharad, dr and heir of Ednyved ap Tudyr ap Gronw, ap Tudyr ap Gronw ap Ednyved Vychan. And this Angharad was the mother of Ievan Vychan, ap Ievan, ap Adda.-- III. The Third Court in Mostyn in Tegeingl which was the possession of Angharad dr. of Howel ap Tudyr, ap Ithel Vychan. And this Angharad was the mother of Howel, ap Ieuan Vychan. -- IV. The Fourth Court is Tre'r Garnedd, in Môn, in the Cwmmwd of Menai, and Tre Nanthyelan in the Cwmmwd of Twr Kelyn in Môn with their appurtenances. All those were part of the possessions of Morvydd, dr and heir of Sir Gruffydd Lloyd Bart. This Morvydd was the wife of Madoc Gloddaith -- V. The Fifth Court is the Court of Gloddaith in the Cwmmud of Creuddyn, which was the possession of Margaret, dr of Gruffydd ap Rhys ap Gruffydd ap Madoc Glodlaith. And the said Margaret was the mother of Harry Salsbury, ap Harry, ap Thomas Hen Salsbury."
Mostyn Hall is near the Estuary of the Dee, in Flintshire.