The viceroy of Mastino was treating at the same time with the Pisans and putting up Lucca at auction. After various altercations about the payment of the money, the people of the Florentines were finally introduced into Lucca; but two strong places belonging to the Lucchese, the Cerruglio and Montechiaro, still remained in the hands of the Pisans, for which 70,000 florins in gold were deducted. The Pisans, however, would not depart; and remaining immovable in the plain of Lucca, the Florentines would have shown their sense by standing upon the defensive, and either by occupying important posts prevented the transport of provisions to the Pisan army, or harassed their country with inroads; but they were ashamed of leaving them quiet; and approaching the enemy, they offered them battle near the Ghiaia, which the Pisans did not refuse; and they fought with varying fortune. The victory inclined in the beginning in favour of the Florentines, and Giovanni Visconti son of Lucchino was made prisoner; but falling into disorder, in following up the enemy, they were routed and put to flight by a band which remained in guard of the camp. The archers took a great part in this victory, amongst whom were many Genoese, greatly renowned in this manner of warfare. The cavalry of the Florentines, so much more numerous than that of the Pisans, was in a great measure disabled for action by the arrows. The loss of the Florentines, in killed and prisoners, was not less than two thousand men. The Pisans, taking courage at this advantage, again surrounded Lucca. It was singular enough to behold the ambassadors of King Robert, appearing at this moment, demanding the possession of Lucca from the Florentines, as his own property, telling them Lucca had been given over to his hands since the year 1313, when it was taken from them by Uguccione dà Faggiuola. The prompt consent of the Florentines, however, did not occasion less astonishment, who thus lost a city they had so much desired and had purchased with so much treasure and blood.