 Complete the following phrase:  A subsequent rebuilding saw the timber palisades of the inner bailey replaced by stone walls and towers. Exactly when this happened is unclear, but it may have been under Peter of Savoy, the Earl of Richmond, who was granted the castle by Henry III in 1246. There is no record of the rebuilding but in 1254 Peter ended the feudal requirement to maintain the palisades and replaced it with cash payments. This probably reflected the replacement of the palisades with the stone walls and towers visible today. The castle faced a lengthy siege only a decade later during the Second Barons War from the rebel baron Simon de Montfort, following Henrys defeat in the 