The art of poisoning never excited more attention than it did in France about the year 1670[123]. Mary Margaret d’Aubray, daughter of the lieutenant-civil Dreux d’Aubray, was in the year 1651 married to the Marquis de Brinvillier, son of Gobelin president of the Chamber of Accounts, who had a yearly income of thirty thousand livres, and to whom she brought a portion of two hundred thousand. He was mestre-de-camp of the regiment of Normandy, and during the course of his campaigns became acquainted with one Godin de Sainte Croix, a young man of a distinguished family, who served as a captain of cavalry in the regiment of Trassy. This young officer, who was then a needy adventurer, became a constant visitor of the marquis, and in a short time paid his addresses to the marchioness, who lost her husband after she had helped to dissipate his large fortune, and was thus enabled to enjoy her amours in greater freedom. Her indecent conduct, however, gave so much uneasiness to her father, that he procured a lettre de cachet, had Sainte Croix arrested while in a carriage by her side, and thrown into the Bastille[124]. Sainte Croix there got acquainted with an Italian named Exili, who understood the art of preparing poison, and from whom he learnt it. As they were both set at liberty after a year’s imprisonment, Sainte Croix kept Exili with him until he became perfectly master of the art, in which he afterwards instructed the marchioness, in order that she might employ it in bettering the circumstances of both. When she had acquired the principles of the art, she assumed the appearance of a nun, distributed food to the poor, nursed the sick in the Hôtel-Dieu, and gave them medicines, but only for the purpose of trying the strength of her poison undetected on these helpless wretches[125]. It was said in Paris, by way of satire, that no young physician, in introducing himself to practice, had ever so speedily filled a churchyard as Brinvillier. By the force of money, she prevailed on Sainte Croix’s servant, called La Chaussée, to administer poison to her father, into whose service she got him introduced, and also to her brother, who was a counsellor of the parliament, and resided at his father’s house. To the former the poison was given ten times before he died; the son died sooner; but the daughter, Mademoiselle d’Aubray, the marchioness could not poison, because perhaps she was too much on her guard; for a suspicion soon arose that the father and son had been poisoned, and the bodies were opened. She would however have escaped, had not Providence brought to light the villany.