In return for this concession, Biron had pledged himself to his wily ally that he would provide so much occupation for Henry in the interior of his kingdom, that he should have no leisure to attempt the invasion of the marquisate of Saluzzo, a pledge which more than any other gratified M. de Savoie, who lived in constant dread of being driven from his territories.  During the war the Marechal nevertheless took several of the Duke’s fortresses in Brescia; but a perfect understanding had been established between them which rendered this circumstance comparatively unimportant; and on the refusal of Henry to permit the appointment of a governor of his own selection for the citadel of Bourg, Biron became so incensed by what he designated as the ingratitude of his sovereign—­though he was fully aware that by countenancing such an arrangement the King must necessarily leave the fortress entirely in his power—­that he no longer restrained himself, but declared that the death of the French sovereign was essential to the accomplishment of his projects; and meanwhile he gave the Duke of Savoy, whom he thenceforward regarded as his firmest friend, constant information of the state and movements of the hostile army.

A short time afterwards it was definitely arranged between the conspirators that the Duke of Savoy should give his third daughter in marriage to the Marechal, with a dowry of five hundred thousand golden crowns; that the Spanish monarch should cede to him all his claims of sovereignty upon the duchy of Burgundy; and that the Conde de Fuentes[178] and the Duke of Savoy should march their combined forces into France, thus disabling Henry from pursuing his design of reconquering the long-coveted duchy.

This treasonable design, owing to circumstances upon which the impetuous Biron had failed to calculate, proved, however, abortive; and he had no sooner convinced himself of the fact, and comprehended the perilous position in which he had been placed by his imprudence, than he hastened to Lyons, where the King was then sojourning; and having obtained an audience, he confessed with a seeming frankness irresistible to so generous and unsuspicious a nature as that of Henry, that he had been sufficiently misled by his ambition secretly to demand from the Duke of Savoy the hand of his younger daughter; and that, moreover, in the excess of his mortification at the refusal of his Majesty to appoint a governor of his own selection at Bourg, he had even been induced to plot against the state, for both which crimes he humbly solicited the royal pardon.

Full well did Henry and his minister remember this occurrence; nor could the King forget that although he had urged the Marechal to reveal to him the whole extent of the intrigue, he had dexterously evaded his most searching inquiries, and constantly recurred to his contrition.  Henry owed much to Biron, whom he had long loved; and with a magnanimity worthy of his noble nature, after a few expostulations and reproaches, he not only pardoned him for what he believed to have been a mere temporary abandonment of his duties, but even assured him of his future favour, and bade him return in all security to his post.