Stephen, King of England of their castles in England. This threat was backed up by the arrest of the bishops, with the exception of Nigel who had taken refuge in Devizes Castle; the bishop only surrendered after Stephen besieged the castle and threatened to execute Roger le Poer. The remaining castles were then surrendered to the King. Stephen's brother, Henry of Blois, was alarmed by this, both as a matter of principle, since Stephen had previously agreed in 1135 to respect the freedoms of the church, and more pragmatically because he himself had recently built six castles and had no desire to be treated
England and King David I of 1135 had resulted in a significantly expanded kingdom. David, moreover, was no longer in practice a sub-king. So if King Henry's life and reign had brought David all his fortune, Henry's death had brought David even more. The settlement with Stephen was not set to last long. The arrival in England of the Empress Matilda, claimant to the English throne, gave David an opportunity to renew the conflict with Stephen. When Stephen was captured by the Matilda's forces on 2 February 1141, David finally decided to disregard his agreement with Stephen and seek the support of Matilda. In either