Marie, Marchioness of Brinvilliers, lived with her husband in the Rue des Cordeliers in Paris. The Marquis was a man of easy morals, and the Marchioness was a woman of still easier morals, for she had many lovers; she also amused her leisure hours by the study of the nature and properties of a great variety of deadly poisons; thinking, no doubt, as she was of a jealous disposition, that the time might arrive when her knowledge would be useful in depriving her lover of the temptation which had led him to forget his duty to her. The Marchioness was a very beautiful woman; she had eyes of a tender blue; her complexion was of dazzling whiteness, with cheeks of a delicate carnation; her expression was angelic, and she wore her hair of pale gold in bushy ringlets, in obedience to the fashion of the time. We first become acquainted with the Marchioness under painful circumstances, for she made—and kept—an appointment with one lover without being sufficiently careful to disguise her doings from another. That other was the Chevalier Gaudin de Sainte-Croix, who proceeded to the lodgings of his rival, M. Camille Theria.
“‘The Marchioness of Brinvilliers is here, I believe,’ said Gaudin to the grisette at the door. ‘Will you tell her she is wanted on pressing business?’
“The Marchioness appeared. A stifled scream of fear and surprise, yet sufficiently intense to show her emotion at the sight of Gaudin, broke from her lips as she recognised him. But she immediately recovered her impassibility of features—that wonderful calmness and innocent expression which afterwards was so severely put to the proof without being shaken—and she asked, with apparent unconcern:
“‘Well, monsieur, what do you want with me?’
“‘Marie!’ exclaimed Gaudin, ‘let me ask your business here at this hour’ (it was rather late) ‘unattended, and in the apartment of a scholar of the Hôtel Dieu?’
“‘You are mad, Sainte-Croix,’ said the Marchioness. ‘Am I to be accountable to you for all my actions? M. Theria is not here, and I came to see his wife on my own affairs.’
“‘Liar!’ cried Gaudin.”
The lady had not told the truth, for M. Theria had no wife, and he was so near by that he heard the angry voice of M. Sainte-Croix, who so convinced the Marchioness of her perfidy that “in an instant the accustomed firmness of the Marchioness deserted her, and she fell upon her knees at his feet on the cold, damp floor of the landing.”
In this powerful etching nothing could surpass the beauty of the face and figure of the Marchioness; she exactly realizes our ideal. But the Chevalier, though full of passion, is, to my mind, verging on the theatrical.
Finding that her entreaties to the Chevalier to “go away” have no effect, she threatens suicide.