The police set a trap for Marie Bosse, and she betrayed herself.
Later, under torture, she betrayed La Vigoureux. La Vigoureux betrayed others, and these others again.
The arrest of Marie Bosse was like knocking down the first of a row of ninepins, but none could have suspected that the last of these stood in the royal apartments.
On the day before she was to repair to Saint-Germain, La Voisin, betrayed in her turn, received a surprise visit from the police -who, of course, had no knowledge of the regicide their action was thwarting - and she was carried off to the Chatelet. Put to the question, she revealed a great deal; but her terror of the horrible punishment reserved for regicides prevented her to the day of her death at the stake - in February of 1680 from saying a word of her association with Madame de Montespan.
But there were others whom she betrayed under torture, and whose arrest followed quickly upon her own, who had not her strength of character. Among these were La Filastre and the magician Lesage.
When it was found that these two corroborated each other in the incredible things which they related, the Chambre Ardente took fright. La Reynie, who presided over it, laid the matter before the King, and the King, horror-stricken by the discovery of the revolting practices in which the mother of his children had been engaged, suspended the sittings of the Chambre Ardente, and commanded that no further proceedings should be taken against Lesage and La Filastre, and none initiated against Romani, Bertrand, the Abbe Guibourg, and the scores of other poisoners and magicians who had been arrested, and who were acquainted with Madame de Montespan's unholy traffic.
But it was not out of any desire to spare Madame de Montespan that the King proceeded in this manner; he was concerned only to spare himself and his royal dignity. He feared above all things the scandal and ridicule which must touch him as a result of publicity, and because he feared it so much, he could impose no punishment upon Madame de Montespan.
This he made known to her at the interview between them procured by his minister Louvois, at about the time that the sittings of the Chambre Ardente were suspended.
To this interview that proud, domineering woman came in dread, and in tears and humility for once. The King's bearing was cold and hard. Cold and hard were the words in which he declared the extent of his knowledge of her infamy, words which revealed the loathing and disgust this knowledge brought him. If at first she was terror-stricken, crushed under the indictment, yet she was never of a temper to bear reproaches long. Under his scorn her anger kindled and her humility was sloughed.
"What then?" she cried at last, eyes aflash through lingering tears.
"Is the blame all mine? If all this is true, it is no less true that I was driven to it by my love for you and the despair to which your heartlessness and infidelity reduced me. To you," she continued, gathering force at every word, "I sacrificed everything - my honour, a noble husband who loved me, all that a woman prizes.
And what did you give me in exchange? Your cruel fickleness exposed me to the low mockery of the lick-spittles of your Court. Do you wonder that I went mad, and that in my madness I sacrificed what shreds of self-respect you had left me? And now it seems I have lost all but life. Take that, too, if it be your pleasure. Heaven knows it has little value left for me! But remember that in striking me you strike the mother of your children - the legitimate children of France. Remember that!"He remembered it. Indeed, he was never in danger of forgetting it;for she might have added that he would be striking also at himself and at that royal dignity which was his religion. And so that all scandalous comment might be avoided she was actually allowed to remain at Court, although no longer in her first-floor apartments;and it was not until ten years later that she departed to withdraw to the community of Saint Joseph.
But even in her disgrace this woman, secretly convicted among other abominations of attempting to procure the poisoning of the King and of her rival, enjoyed an annual pension of 1,200,000 livres; whilst none dared proceed against those who shared her guilt - not even the infamous Guibourg, the poisoners Romani and Bertrand, and La Filastre - nor yet against some scores of associates of these, who were known to live by sorcery and poisonings, and who might be privy to the part played by Madame de Montespan in that horrible night of magic at the Chateau de Villebousin.
The hot blast of revolution was needed to sweep France clean.