Fortune appeared to be playing with the Florentines, by offering and taking away from them, at the same time, the city of Lucca, always annoying them, whether they aimed at obtaining it by arms or by money. Mastino Scala, after the loss of Parma, which had been taken away from him by Azzo Correggio, seeing himself unable any longer to maintain Lucca, offered it to the Florentines for the sum of 250,000 florins in gold; the latter consented; but before it came to their hands, they were obliged to contend with the Pisans, who thought they would no longer be enabled to maintain their liberty if Lucca belonged to the Florentines. They would have been better pleased, as they were not able to conquer the Florentines by money, had Lucca remained free; various councils were held in which it was finally determined they should take up arms and contend for the possession of Lucca with the Florentines, and after some fruitless treaty with Mastino they laid siege to it. They had collected many troops both from the Tuscan Ghibellines and the lords of Lombardy, particularly from Lucchino Visconti, whose friendship they had purchased with treachery. One of the first Milanese citizens, Francis of Postierla, had married a near relative of Lucchino, the beautiful and virtuous Margaret Visconti who had rejected Lucchino when he fell in love with her. His ill will being made known to the husband, induced him to frame a conspiracy; upon the discovery of which Francis fled to Avignon, whence he was attracted by Lucchino to Pisa by the most insidious artifices. In spite of a safe passage, of which the rulers of Pisa had assured him, he was taken and consigned to Lucchino; who, in order to crown his barbarous brutality, ordered him to be beheaded, together with his beloved and unfortunate consort. For this act of perfidy the Pisans received powerful assistance from Lucchino, and were enabled to maintain their position in front of the Florentines.