Cenwalh was restored to his kingdom . How he was allowed to return is not recorded. Nor is it recorded who ruled Wessex in his absence. But an entry in the Anglo-Saxon Chronicle for the year 648 seems to indicate it might have been Cuthred, the son of Cwichelm. Cenwalh gave Cuthred three thousand hides of land (300–450 square miles) of land at Ashdown in Berkshire. This may have been most, if not all, of Berkshire. This was much larger than an estate a king might give a family member. Cenwalh seems to have left the Thames river basin as a result of pressure from Mercia. That made Berkshire his northern frontier with Mercia.