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
Owain Lawgoch Poursuivant d'Amour", a descendant of Ednyfed Fychan, Seneschal of Gwynedd under Owain's ancestors. Owain also received financial support while in France from Ieuan Wyn's father, Rhys ap Robert. While in French service Owain had good relations with Bertrand du Guesclin and others and gained the support of Charles V of France. Welsh soldiery and longbowmen who had fought for Edward I in his campaigns in North Wales remained armed and sold their services to Norman kings in their battles in Scotland and at Crecy and Poitiers. Ironically, the Norman attempt to conquer Wales set in train events which reignited Welsh