vol.i.p.

363.
Without regard to his oaths and subscriptions, that enterprising conspirator directed his two sons, richard and Peter de Mountfort, in conjunction with Robert de Ferrers, earl of Derby, to attack the city of Worcester; while Henry and Simon de Mountfort, two others of his sons, assisted by the prince of Wales, were ordered to lay waste the estate of Roger de Mortimer.

He himself resided at London; and employing as his instrument Fitz-Richard, the seditious mayor, who had violently and illegally prolonged his authority, he wrought up that city to the highest ferment and agitation.

The populace formed themselves into bands and companies; chose leaders; practised all military exercises; committed violence on the royalists; and to give them greater countenance in their disorders, an association was entered into between the city and eighteen great barons, never to make peace with the king but by common consent and approbation.

At the head of those who swore to maintain this association, were the earls of Leicester, Glocester, and Derby, with Le Despenser, the chief justiciary; men who had all previously sworn to submit to the award of the French monarch.