The Earls of Derby had a claim to the Peveril family's estates through marriage, and in 1199 William de Ferrers, the fourth earl, paid 2,000 marks for the Peak lordship, although the castle remained under royal control. The closest Peveril Castle came to seeing battle was in 1216, when King John gave the castle to William de Ferrers, but the castellan refused to relinquish control. Although they were both John's supporters, the king authorised the earl to use force to evict the castellan, who eventually capitulated, although there is no evidence that the castle was assaulted.