Edward, the Black Prince
He accompanied the Cardinal to the Battle of Poitiers. Before the battle, the Cardinal attempted to mediate between the English forces under Edward, the Black Prince and the French forces under John II of France. Robert, like many of the Cardinal's men, joined the fight on the French side, and was killed there. This violation of the neutrality which ought to adhere to a churchman and mediator so provoked Edward the Black Prince that he had Robert's body borne on a shield to the Cardinal as a mocking salute.