Borgia, having secured fourteen distinguished inhabitants of Urbino as hostages, ordered that the fortresses left by agreement in the hands of Guidobaldo should be attempted: that of Maiuolo was accordingly surprised about the beginning of May, and easily reduced. S. Leo being better provided, as well as considered impregnable, its siege was more methodically undertaken, and levies were ordered to reinforce the assailants. The amount of public sympathy with the cause may be estimated from Baldi's assertion that, in the city of Urbino, the utmost difficulty was experienced in raising eight foot soldiers with one month's pay. Eight hundred Gascons in the French service were obtained from De la Tremouille; but these, having turned the siege into a sort of blockade, were dispersed among the neighbouring villages, where, on the 5th of June, their revels were suddenly interrupted by unknown assailants, who disappeared as mysteriously as they had issued from the mountain defiles, leaving many of the besiegers slain or wounded. The surrounding peasantry, catching the enthusiasm, rushed to arms, and, but for extraordinary exertions, the whole duchy would have once more been out for their legitimate lord. News of this movement having reached the Duke early in July, he obtained from Florence free passage through her territory, and from the Venetians a promise of passive support, and thereupon put himself into communication with his principal adherents, by means of letters carried by persons of low condition, many of which were unfortunately intercepted by the lieutenant-governor of Urbino. His people were thus kept in a fever of expectation; but, finally, this plan of an invasion was abandoned, whereupon he repaired to Mantua, to his brother-in-law the Marquis, who had been taken into the French service under De la Tremouille, and engaged him to represent to Louis the hardships of his case, and the danger of Borgia's excessive ambition. Disgusted with their ignominious overthrow at S. Leo, the Gascons assumed the habitual licence of such mercenaries, by soon taking their departure from "The tentless rest beneath the humid sky, The stubborn wall that mocks the leaguer's art, And palls the patience of his baffled heart."