This duty performed, M. d'Alincourt solicited the permission of the Pope to accompany Sillery to Florence to pay his respects to the Princess and to negotiate the alliance; and having obtained the required sanction, the two nobles set forth upon their embassy, quite unaware that the preliminaries were already nearly concluded.

On the arrival of the Court in Paris the seals were taken from the Chancellor, and delivered into the keeping of Guillaume du Vair, who was at that period in his sixtieth year, on the pretext that so important a charge must be oppressive to M. de Sillery at his advanced age; a subterfuge which could not have failed to excite the discontent of the people had they not distrusted his cupidity as much as Marie was wearied of his services.

This attempt was, however, frustrated by an offer made to them by Sillery of a million in gold, as payment of the debt still due to them from the French government for their past services; which enormous sum reached them through the hands of the Duc de Biron, to whom, as well as to the memory of his father, the old Maréchal, many of the Switzers were strongly and personally attached.