Some French knights who skirmished with the English advanced guard retreated into Romorantin, and when Prince Edward heard of this he said: "Let us go there; I should like to see them a little nearer". He inspected the fortress in person and sent his friend Chandos to summon the garrison to surrender. The place was defended by Boucicault and other leaders, and on their refusing his summons he assaulted it on 31 August. The siege lasted three days, and the prince, who was enraged at the death of one of his friends, declared that he would not leave the place untaken. Finally he set fire to the roofs of the fortress by using Greek fire, reduced it on 3 September.