Gwilym ap Tudur Rhys and Owain Glyndŵr. As a result, the Tudur brothers began planning an attack on Conway Castle. On Good Friday, 1 April 1401, the brothers and 44 men (which included those who had also been excluded from the pardons) infiltrated the castle. They had pretended to be carpenters, and captured the castle while the guard were in church. Negotiations began for the return of the castle on 13 April, with the king represented by Henry "Hotspur" Percy and Gwilym representing the Welsh forces. After seeking a compromise, which would have resulted in pardons being given to the Welshmen, the king
Alys ferch Owain Glyndŵr this day in Kentchurch on the modern day England/Wales border almost exactly halfway between Abergavenny and Hereford near the River Monnow. In 1999, it was reported that they knew the precise whereabouts of Glyndŵr's secret grave. In 2006, the Owain Glyndwr Society's president Adrien Jones said: "Four years ago we visited a direct descendant of Glyndwr, a John Skidmore, at Kentchurch Court, near Abergavenny. He took us to Mornington Straddle, in Herefordshire, where one of Glyndwr's daughters, Alice, lived. Mr Skidmore told us that he (Glyndŵr) spent his last days there and eventually died there... It was a family secret