 Since Humphrey ( VI ) was only sixteen years old at the time of his father 's death , the Braose lands were taken into the king 's custody until 1270 . Part of this inheritance , the Marcher lordship of Brecon , was in the meanwhile given to the custody of Gilbert de Clare , Earl of Hertford . Humphrey technically regained his lordship from Clare in 1270 , but by this time these lands had effectively been taken over by the Welsh prince Llywelyn ap Gruffudd , who had taken advantage of the previous decade 's political chaos in England to extend his territory into the Marches . 
