There resided in the city of Lucca the Poggio family, who were so powerful that they could not only elevate Castruccio, but even advance him to the dignity of prince; and it appearing to them they had not received such rewards for their services as they deserved, they incited other families to rebel and to drive Castruccio out of Lucca. They found their opportunity one morning, and arming themselves, they set upon the lieutenant whom Castruccio had left to maintain order and killed him. They endeavoured to raise the people in revolt, but Stefano di Poggio, a peaceable old man who had taken no hand in the rebellion, intervened and compelled them by his authority to lay down their arms; and he offered to be their mediator with Castruccio to obtain from him what they desired. Therefore they laid down their arms with no greater intelligence than they had taken them up. Castruccio, having heard the news of what had happened at Lucca, at once put Pagolo Guinigi in command of the army, and with a troop of cavalry set out for home. Contrary to his expectations, he found the rebellion at an end, yet he posted his men in the most advantageous places throughout the city. As it appeared to Stefano that Castruccio ought to be very much obliged to him, he sought him out, and without saying anything on his own behalf, for he did not recognize any need for doing so, he begged Castruccio to pardon the other members of his family by reason of their youth, their former friendships, and the obligations which Castruccio was under to their house. To this Castruccio graciously responded, and begged Stefano to reassure himself, declaring that it gave him more pleasure to find the tumult at an end than it had ever caused him anxiety to hear of its inception. He encouraged Stefano to bring his family to him, saying that he thanked God for having given him the opportunity of showing his clemency and liberality. Upon the word of Stefano and Castruccio they surrendered, and with Stefano were immediately thrown into prison and put to death. Meanwhile the Florentines had recovered San Miniato, whereupon it seemed advisable to Castruccio to make peace, as it did not appear to him that he was sufficiently secure at Lucca to leave him. He approached the Florentines with the proposal of a truce, which they readily entertained, for they were weary of the war, and desirous of getting rid of the expenses of it. A treaty was concluded with them for two years, by which both parties agreed to keep the conquests they had made. Castruccio thus released from this trouble, turned his attention to affairs in Lucca, and in order that he should not again be subject to the perils from which he had just escaped, he, under various pretences and reasons, first wiped out all those who by their ambition might aspire to the principality; not sparing one of them, but depriving them of country and property, and those whom he had in his hands of life also, stating that he had found by experience that none of them were to be trusted. Then for his further security he raised a fortress in Lucca with the stones of the towers of those whom he had killed or hunted out of the state.
Whilst Castruccio made peace with the Florentines, and strengthened his position in Lucca, he neglected no opportunity, short of open war, of increasing his importance elsewhere. It appeared to him that if he could get possession of Pistoia, he would have one foot in Florence, which was his great desire. He, therefore, in various ways made friends with the mountaineers, and worked matters so in Pistoia that both parties confided their secrets to him. Pistoia was divided, as it always had been, into the Bianchi and Neri parties; the head of the Bianchi was Bastiano di Possente, and of the Neri, Jacopo da Gia. Each of these men held secret communications with Castruccio, and each desired to drive the other out of the city; and, after many threatenings, they came to blows. Jacopo fortified himself at the Florentine gate, Bastiano at that of the Lucchese side of the city; both trusted more in Castruccio than in the Florentines, because they believed that Castruccio was far more ready and willing to fight than the Florentines, and they both sent to him for assistance. He gave promises to both, saying to Bastiano that he would come in person, and to Jacopo that he would send his pupil, Pagolo Guinigi. At the appointed time he sent forward Pagolo by way of Pisa, and went himself direct to Pistoia; at midnight both of them met outside the city, and both were admitted as friends. Thus the two leaders entered, and at a signal given by Castruccio, one killed Jacopo da Gia, and the other Bastiano di Possente, and both took prisoners or killed the partisans of either faction. Without further opposition Pistoia passed into the hands of Castruccio, who, having forced the Signoria to leave the palace, compelled the people to yield obedience to him, making them many promises and remitting their old debts. The countryside flocked to the city to see the new prince, and all were filled with hope and quickly settled down, influenced in a great measure by his great valour.
About this time great disturbances arose in Rome, owing to the dearness of living which was caused by the absence of the pontiff at Avignon. The German governor, Enrico, was much blamed for what happened—murders and tumults following each other daily, without his being able to put an end to them. This caused Enrico much anxiety lest the Romans should call in Ruberto, the King of Naples, who would drive the Germans out of the city, and bring back the Pope. Having no nearer friend to whom he could apply for help than Castruccio, he sent to him, begging him not only to give him assistance, but also to come in person to Rome. Castruccio considered that he ought not to hesitate to render the emperor this service, because he believed that he himself would not be safe if at any time the emperor ceased to hold Rome. Leaving Pagolo Guinigi in command at Lucca, Castruccio set out for Rome with six hundred horsemen, where he was received by Enrico with the greatest distinction. In a short time the presence of Castruccio obtained such respect for the emperor that, without bloodshed or violence, good order was restored, chiefly by reason of Castruccio having sent by sea from the country round Pisa large quantities of corn, and thus removed the source of the trouble. When he had chastised some of the Roman leaders, and admonished others, voluntary obedience was rendered to Enrico. Castruccio received many honours, and was made a Roman senator. This dignity was assumed with the greatest pomp, Castruccio being clothed in a brocaded toga, which had the following words embroidered on its front: “I am what God wills.” Whilst on the back was: “What God desires shall be.”
During this time the Florentines, who were much enraged that Castruccio should have seized Pistoia during the truce, considered how they could tempt the city to rebel, to do which they thought would not be difficult in his absence. Among the exiled Pistoians in Florence were Baldo Cecchi and Jacopo Baldini, both men of leading and ready to face danger. These men kept up communications with their friends in Pistoia, and with the aid of the Florentines entered the city by night, and after driving out some of Castruccio’s officials and partisans, and killing others, they restored the city to its freedom. The news of this greatly angered Castruccio, and taking leave of Enrico, he pressed on in great haste to Pistoia. When the Florentines heard of his return, knowing that he would lose no time, they decided to intercept him with their forces in the Val di Nievole, under the belief that by doing so they would cut off his road to Pistoia. Assembling a great army of the supporters of the Guelph cause, the Florentines entered the Pistoian territories. On the other hand, Castruccio reached Montecarlo with his army; and having heard where the Florentines’ lay, he decided not to encounter it in the plains of Pistoia, nor to await it in the plains of Pescia, but, as far as he possibly could, to attack it boldly in the Pass of Serravalle. He believed that if he succeeded in this design, victory was assured, although he was informed that the Florentines had thirty thousand men, whilst he had only twelve thousand. Although he had every confidence in his own abilities and the valour of his troops, yet he hesitated to attack his enemy in the open lest he should be overwhelmed by numbers. Serravalle is a castle between Pescia and Pistoia, situated on a hill which blocks the Val di Nievole, not in the exact pass, but about a bowshot beyond; the pass
