Always sickly and querulous, Louis was a prey to dark thoughts and fearful anticipations of early dissolution; and even while he suffered himself to be amused by the hawking, dancing, and feasting so lavishly provided for his entertainment, he was never at fault, during his frequent fits of moroseness and ill-humour, for subjects of complaint.  His brother, Gaston d’Anjou, whom he at once feared and hated, was a constant theme of distrust; while the Comte de Soissons, the Duc de Montmorency, and the Prince de Chalais, his sworn adherents, were at times equally obnoxious to the suspicious and gloomy young sovereign.  Then he bewailed the treachery of the Queen, whom he believed, through the agency of Richelieu, to be engaged in an intrigue with Spain dangerous to his own interests; mourned over himself because he had weakly suffered his authority to be usurped by a subject, and had not moral courage to redeem the error; and in his most confidential moments even inveighed against Richelieu with the bitterness of a sullen schoolboy, declaring that it was he who had poisoned the mind of his brother, estranged him from his wife, and deprived him of the support of the Princes of the Blood; forgetting, or wilfully overlooking the fact, that a single effort on his own part must have sufficed for his emancipation from this rule of iron.

On the departure of the Court for Fontainebleau, the Cardinal, according to his usual custom, had excused himself on the plea of ill-health from following the King; while Gaston d’Anjou, who, despite the concession that he had made, still deeply resented the affront to which he had been subjected by the arrest of his favourite, had remained in Paris.  Richelieu, was, however, far from inactive in his retreat; but, while he was occupied in further schemes of self-aggrandizement, the partisans of the Prince were equally busy in devising the means of ridding themselves of a thrall so obnoxious to their pride; and after mooting several measures which were successively abandoned from their apparent impracticability, it was at length decided that, under the pretext of a hunting-party, nine of the conspirators should proceed to Fleury, and there assassinate their common enemy.  Of this number was the unfortunate Chalais; who, however, before the execution of the project, confided it to a friend, by whom he was warned against any participation in so dangerous an attempt, and advised immediately to apprise the Cardinal of his danger.  As the young Prince hesitated to follow this counsel, the Commandeur de Valence, who was anxious to save him from, as he believed, inevitable destruction, assured him that should he fail to communicate the conspiracy to the minister, he would himself instantly reveal it; upon which Chalais, intimidated by the threat, consented to accompany him to Richelieu, and to confess the whole.

Having listened attentively to all the details of the plot, the Cardinal courteously thanked his informants, and requested them to proceed to Fontainebleau, and to repeat what they had told him to the King.  He was obeyed; and an hour before midnight Louis despatched a body of troops to Fleury, with instructions to obey the orders of the minister whatever might be their nature; while Marie de Medicis at the same time commanded the officers of her household and a number of the nobility to accompany the royal guards.