In return for this kind reception, Caesar consented to yield the fortress of Cesena to the pope, as being a town which had once belonged to the Church, and now should return; giving the deed, signed by Caesar, to one of his captains, called Pietro d'Oviedo, he ordered him to take possession of the fortress in the name of the Holy See.

Pietro obeyed, and starting at once for Cesena, presented himself armed with his warrant before Don Diego Chinon; a noble condottiere of Spain, who was holding the fortress in Caesar's name.

But when he had read over the paper that Pietro d'Oviedo brought, Don Diego replied that as he knew his lord and master was a prisoner, it would be disgraceful in him to obey an order that had probably been wrested from him by violence, and that the bearer deserved to die for undertaking such a cowardly office.

He therefore bade his soldiers seize d'Oviedo and fling him down from the top of the walls: this sentence was promptly executed.
This mark of fidelity might have proved fatal to Caesar: when the pope heard how his messenger had been treated, he flew into such a rage that the prisoner thought a second time that his hour was come; and in order to receive his liberty, he made the first of those new propositions to Julius II, which were drawn up in the form of a treaty and sanctioned by a bull.

By these arrangements, the Duke of Valentinois was bound to hand over to His Holiness, within the space of forty days, the fortresses of Cesena and Bertinoro, and authorise the surrender of Forli.