Novello secured his safety, as usual, by flight; but Provenzano Salvani justified his fame by dying sword in hand. His head was carried round the field on the point of a spear. This was the fulfilment of a prophecy made to him before the battle: "Thy head shall be the highest in the field," although he had interpreted the saying as an omen of success. The Siennese received no quarter from their foes, who returned home in triumph, and thinking they had now avenged the rout of Montaperti, began negotiations for peace. The first condition exacted was that Sienna should no longer harbour Ghibelline refugees, who, in fact, were soon compelled to depart and wander from place to place, everywhere exposed to persecution and cruelty. Among others were the Pazzi, who, having excited the Castle of Ostina to revolt, were seized and hacked to pieces. After a devastating raid on Pisan territory, executed by the Florentines and Lucchese, Pisa signed a treaty of peace with Charles in April, 1270. Florence herself concluded an alliance with that republic on the 2nd of May, stipulating almost the identical terms and the same politico-commercial agreements previously arranged by the peace of 1256.[305] Just at that time Azzolino, Neracozzo, and Conticino degli Uberti, together with a knight named Bindo dei Grifoni, left Sienna to take refuge in the Casentino, and were captured by the Florentines on the way. The latter asked Charles what should be done with these prisoners, and he replied, that they were to be punished as traitors, save Conticino the youngest, who was to be sent to him. The others were speedily beheaded, by order of the Podestà Berardino d'Ariano (May 8, 1270). It is related that on nearing the scaffold Neracozzo said to Azzolino: "Whither are we going?" To which his kinsman quietly replied: "To pay a debt bequeathed us by our fathers." Conticino perished in a Capuan dungeon. This instance clearly proves the great supremacy exercised by Charles over the Commonwealth. But the Florentines were willing to tolerate anything from him in order to assure their predominance in Tuscany by his help, and restore the prestige of the Guelph party. The latter aim was already practically achieved, for all Tuscany now adhered to the Guelphs, and both old and recent injuries had been avenged. At this time Florence also demolished the Castle of Pian di Mezzo in the Val d'Arno and razed the walls of Poggibonsi.