In communicating the fatal letters to the Queen, she had calculated that the indignation and jealousy of the Italian Princess would instigate her to take instant possession of so formidable a weapon against her most dangerous enemy, and to work out her own vengeance; but Marie had learnt prudence from past experience, and she was anxious to conceal her own agency in the cabal until she could avow it with a certainty of triumph.

Perceiving the reluctance of Madame de Villars to take the initiative, she hastened to explain to her the suspicion which would naturally be engendered in the mind of the King, should he imagine that the affair had been preconcerted to satisfy her private animosity; and moreover suggested that the Duchess should, in her interview with the monarch, carefully avoid even the mention of her name.

Encouragement and entreaties followed this caution; while a few rich presents sufficed to convince her auditor--and ultimately, Madame de Villars (who had too long waited patiently for such an opportunity of revenge to shrink from her purpose when it was secured to her), having gained the favour and confidence of the Queen at the expense of her rival, resolved to terminate her task.
The pretext of urgent business easily procured for her a private interview with the King, for the name of D'Estrees still acted like a spell upon the mind and heart of Henry, and the Duchess was a consummate tactician.

Notice was given to her of the day on which the sovereign would visit St.Denis; and as she presented herself in the lateral chapel where he had just concluded his devotions, Henry made a sign for his attendant nobles to withdraw, when the Duchess found herself in a position to explain her errand, and to assure him that she had only been induced to make the present disclosure from her affection for his person, and the gratitude which she owed to him for the many benefits that she had experienced from his condescension.

Having briefly dwelt on the contents of the letters which she delivered into his keeping, she did not even seek an excuse for the means by which they had come into her own possession, but concluded by observing: "I could not reconcile it to my conscience, Sire, to conceal so great an outrage; I should have felt like a criminal myself, had I been capable of suffering in silence such treason against the greatest king, the best master, and the most gallant gentleman on earth." [163] Henry was not proof against this compliment.