[5] Shortly after he came into possession of large estates left by his paternal grandmother Catherine de' Medici, from one of which he took his title of count of Auvergne.

[9] Charles was released after a few months' imprisonment, chiefly through the influence of his half-sister, his aunt, the duchess of Angoulême and his father-in-law.

[6] A decree of the parlement (1606), obtained by Marguerite de Valois, deprived him of nearly all his possessions, including Auvergne, though he still retained the title.

In 1616 he was released, was restored to his rank of colonel-general of horse, and dispatched against one of the disaffected nobles, the duke of Longueville, who had taken Péronne.

Soon after he was engaged on an important embassy to the Holy Roman Empire, the result of which was the treaty of Ulm, signed July 1620.

In 1591 he obtained a dispensation from the vows of the Order of Malta, and married Charlotte, daughter of Henry, maréchal d'Amville, afterwards Duke of Montmorency[18] and his first wife.