Instigated doubtless by Robert d'Artois or his emissaries, a certain Isabelle de Ferieves, reputed a witch in her own country of Hesdin, testified that Mahaut d'Artois had come to her and asked her to compound a sort of philtre or potion to restore the love of Count Philippe de Poitiers for her daughter Jeanne, then imprisoned at Dourdan under the charge of adultery. Isabelle required Mahaut to procure for her and deliver to her, in secret, some blood from Jeanne's right arm, which she mingled with three herbs, vervain, liver-wort, and daisy, pronouncing over the mixture a mystic incantation. Placing it then upon a clean new brick, she burned it by means of a fire fed with oak wood, and pounded up the paste so produced into a powder, which was to be administered to Philippe in his food or drink or cast upon his right side. For this Isabelle received a substantial price, seventy _livres parisis_, and was given a similar order for a philtre to recover the affections of the Count de la Marche for his wife Blanche. Moreover, she asserted that Mahaut, well pleased with the efficacy of these decoctions, asked for a poison to envenom arrows, which she pretended that she desired to use upon nothing more than the deer of her forests. The enchantress set to work again, with an adder's tail and spine and a toad dried in the open air, which she pounded up into a powder and mingled with wheat flour and incense. The sorceress was painfully lacking in imagination, else we should have had something to rival: "Eye of newt, and toe of frog, Wool of bat, and tongue of dog, Adder's fork, and blind-worm's sting, Lizard's leg, and owlet's wing, For a charm of powerful trouble, Like a hell-broth boil and bubble." But perhaps the report of unsympathetic historians and lawyers has been unjust to her, and has toned down the horrors of her "charm of powerful trouble," which she alleged the Countess Mahaut gave to Louis X., thereby procuring his death and the accession of her son-in-law, Philippe V.