 John became king in 1199 after Richard 's death . William de Ferrers , 4th Earl of Derby maintained the claim of the Earls of Derby to the Peveril estates . He paid King John 2000 marks ( £ 1333 ) for the lordship of the Peak , but the Crown retained possession of Peveril and Bolsover Castles . John finally gave Ferrers these castles in 1216 to secure his support in the face of country @-@ wide rebellion . However , the castellan Brian de Lisle refused to hand them over . Although de Lisle and Ferrers were both King John 's supporters , the king gave Ferrers permission to use force to retake the castles . 
