Some time in August or September another assembly was called to endeavour after a pacification between John and the chancellor. Three bishops and twenty-two laymen were appointed arbitrators--the laymen chosen by the bishops, eleven from the party which had hitherto adhered to William, eleven from the followers of John. The terms which these twenty-five laid down amounted to a decision wholly in John’s favour. They did, indeed, again require him to restore the two royal castles of Nottingham and Tickhill; but they made the restoration an empty form. They decreed that the chancellor should put these castles under the control of two men whom they named, William of Venneval and another friend of John’s, Reginald de Vasseville. These two were to hold the castles for the king and give William hostages for their fidelity; but if Richard should die before reaching home, they were at once to surrender the castles to John, and William was to restore their hostages. The arbitrators further confirmed Gerard de Camville in the constableship of Lincoln castle; they ordered the chancellor to remove the constables of royal castles situated within the lands of the count of Mortain, and appoint others in their stead, “if the count showed reason for changing them”; and they added that “if the king should die, the chancellor was not to disinherit the count, but to do his utmost to promote him to the kingdom.”[150] This last clause was pointed at a negotiation which William had been carrying on with the Scot king, for the purpose of obtaining his recognition of Arthur of Britanny as heir-presumptive to the English Crown. The negotiation was secret; but John had discovered it,[151] and the discovery was a useful weapon in his hands. William’s dealings with Scotland were most probably sanctioned by Richard; their object was certainly in accord with Richard’s own plans for the succession at this time; but Richard’s choice of Arthur as his heir was probably unknown as yet to the majority of his subjects, and if it was known to them, it could not commend itself to their ideas either of policy or of constitutional practice. In their eyes the king’s next-of-kin and natural successor was not his boy-nephew, but his brother. It was therefore easy for John to win their sympathies by representing the scheme as part of a plot contrived against himself by the chancellor.