When the Cardinal da Prato had returned to the Pope, which was at Perugia with his court, he made many complaints against them which were ruling the city of Florence, and accused them before the Pope and the college of cardinals of many crimes and faults, showing them to be sinful men and enemies of God and of Holy Church, and recounting the dishonour and treachery which they had done to Holy Church when he had desired to restore them to good and peaceful estate; for the which thing the Pope and his cardinals were greatly moved with anger against the Florentines, and by the counsel of the said Cardinal da Prato the Pope cited twelve of the chief leaders of the Guelf party and of the Blacks which were in Florence, which were directing all the state of the city, the names whereof were these: M. Corso Donati, M. Rosso della Tosa, M. Pazzino de' Pazzi, M. Geri Spini, M. Betto Brunelleschi. And they were to appear before him under pain of excommunication and deprivation of all their goods; which straightway came obediently thither with a great company of their friends and followers in great state, for they were more than 150 on horseback, to defend themselves before the Pope against the charges which the Cardinal da Prato had made against them. And in this summons and citation of so many leaders of Florence, the Cardinal da Prato cunningly planned a great treachery against the Florentines, straightway sending letters to Pisa, and to Bologna, and to Romagna, to Arezzo, to Pistoia, and to all the leaders of the Ghibelline and White party in Tuscany and in Romagna, that they should assemble with all their forces and those of their friends on foot and on horse, and on a day named should come in arms to the city of Florence, and take the city, and drive out thence the Blacks and those which had been against him, saying that this was by the knowledge and will of the Pope (the which thing was a great falsehood and lie, forasmuch as the Pope knew nothing thereof), and encouraging each one to come securely, forasmuch as the city was weak, and open in many places; and saying that he of his zeal had summoned and caused to appear at the court all the leaders of the Black party, and that within the city there was a large party which would welcome them and would surrender the city to them; and that they should gather together and come secretly and quickly. And when they had received these letters, they rejoiced greatly, and, being encouraged by the favour of the Pope, each one furnished himself according to his power, and moved towards Florence on the day appointed. And two days before, through their great eagerness, the Pisans, with their troops and with all the Florentines which were in Pisa, to the number of 400 horsemen, whereof Count Fazio was captain, came as far as the stronghold of Marti; and all the other assembly of Whites and Ghibellines came towards Florence after so secret a fashion that they were at Lastra above Montughi, to the