D’Ornano, as we have seen, had been commanded to renew the negotiation of marriage between Gaston and the bride destined for him by Henri IV, but private reasons decided him against the measure; and, in consequence of his representations, the Prince formally refused to obey the expressed wishes of the King.  The moment was a favourable one for Richelieu, who had long sought a pretext for ridding himself of Monsieur’s favourite friend and counsellor; and he accordingly lost no time in impressing upon Louis that, as the young Prince was entirely governed by M. d’Ornano, no concession could be expected from him until that individual had been removed from about his person.  Nor was the Marechal alone an object of suspicion and uneasiness to the minister, for it was not long ere he ascertained that the party of the Prince was hourly becoming more formidable, and that were the cabal not crushed in its infancy, it might very soon tend to endanger at once the safety of the sovereign and the tranquillity of the kingdom; while he also learned through his emissaries that his own security was no less involved in the issue than that of Louis himself.

Under these circumstances Richelieu at once felt that the only method by which he could hope to control Gaston was by proceeding with the utmost severity against all such persons as should be convicted of endeavouring to excite the mind of the Prince against his royal brother; a policy which Louis eagerly adopted.  In accordance with this resolution, during the sojourn of the Court at Fontainebleau in the month of May, the King on his return from a hunting-party, after having retired to rest, suddenly rose again, dressed himself, and at ten o’clock at night summoned M. d’Ornano to his presence, whom he entertained for a time with an account of the day’s sport, and other inconsequent conversation, until Du Hallier, the captain of the bodyguard, made his appearance at the head of his archers, and approaching the Marechal, announced to him that he was his prisoner; requesting him to withdraw from the royal apartment, whence he conducted him to the chamber in which the Duc de Biron had been confined twenty-four years previously,[95] while Madame d’Ornano at the same time received an order to quit Paris upon the instant, and the two brothers of the disgraced courtier, together with MM.  Deageant, Modena, and other partisans of the Marechal, were also arrested.

By this bold stroke of policy the Cardinal effectually paralyzed the power of Monsieur; although this conviction was far from allaying his personal apprehensions.  Among the favourites of the Prince he had equally marked for destruction the young Prince de Chalais,[96] the Duc de Vendome, and his brother the Grand Prior; but Richelieu feared by venturing too much to lose all, for his authority had not at that period reached its acme; and he felt all the danger which he must incur by adopting measures of such violence against two Princes of the Blood.