In the year of Christ 1269, in the month of June, the Sienese, whereof M. Provenzano Salvani, of Siena, was governor, with Count Guido Novello, with the German and Spanish troops, and with the Ghibelline refugees from Florence and from the other cities of Tuscany, and with the forces of the Pisans, to the number of 1,400 horse and 8,000 foot, marched upon the stronghold of Colle di Valdelsa, which was under the lordship of the Florentines; and this they did because the Florentines had come in May with an army to destroy Poggibonizzi. And when they had encamped at the abbey of Spugnole, and the news was come to Florence on Friday evening, on Saturday morning M. Giambertaldo, vicar of King Charles for the league of Tuscany, departed from Florence with his troops which he then had with him in Florence to wit 400 French horse; and sounding the bell, and being followed by the Guelfs of Florence on horse and on foot, he came with his cavalry to Colle on Sunday evening, and there were about 800 horsemen or less with but few of the people, forasmuch as they could not reach Colle so speedily as the horsemen. It came to pass that on the following Monday morning, the day of S. Barnabas, in June, the Sienese, hearing that the horsemen had come from Florence, broke up their camp near the said abbey and withdrew to a safer place. M. Giambertaldo, seeing the camp in motion, without awaiting more men passed the bridge with his horse and marshalled his troops with the cavalry of Florence and such of the people as had arrived together with them of Colle (who by reason of the sudden coming of the Florentines were not duly arrayed either with captains of the host or with the standard of the commonwealth); and M. Giambertaldo took the standard of the commonwealth of Florence and requested of the horsemen of Florence, amongst whom were representatives of all the Guelf houses, that one of them should take it; but none advanced to take it, whether through cowardice or through jealousy, one of the other; and after they had been a long time in suspense, M. Aldobrandini, of the house of Pazzi, boldly stepped forward and said: "I take it to the honour of God and of the victory of our commonwealth;" wherefore he was much commended for his boldness; and straightway he advanced, and all the horsemen followed him, and struck boldly into the ranks of the Sienese; and albeit it was not held to be very wise and prudent leadership, yet as it pleased God these bold and courageous folk with good success broke up and defeated the Sienese and their allies, which numbered well-nigh twice as many horse and a great number of foot, whereof many were slain and taken; and if on the Florentine side the foot had arrived and had been at the battle, scarce one of the Sienese would have escaped. Count Guido Novello fled, and M. Provenzano Salvani, lord and commander of the host of the Sienese, was taken prisoner; and they cut off his head and carried it through all the camp fixed on a lance.