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
Glanmor Williams 1957 to 1982, his research interests focused on the Protestant Reformation and its impact on Welsh life and culture. His exceptional study of the Welsh Church after 1282, "The Welsh Church from Conquest to Reformation" was published in 1962. In subsequent works, such as "Owen Glendower" (1966), "Recovery, Reorientation and Reformation" (1987), and "Owain Glyndwr" (1993) Williams documented how English subjugation of Wales was strengthened by the Tudor Acts of Union, and yet still offered scope for the growth and development of Welsh culture. In "Religion, Language and Nationality in Wales" (1979) he described the origins of Welsh cultural and