The trial of Madame de Brinvilliers had just caused an immense sensation. The penitentiaries of Notre Dame, without naming any person, declared that 'the majority of those who had confessed to them for some time accused themselves of poisoning somebody.' The court and the city were still disturbed by the catastrophe which had at St. Cloud suddenly carried off the charming Henrietta, Duchess of Orleans, by the sudden death of Hugues de Lionne, the great statesman, and by the startling fate which had just befallen the Duke of Savoy. A note found on September 21, 1677, in the confessional of the Jesuits in Rue Saint-Antoine denounced a plot to poison the king and the dauphin. On December 5 following, La Reynie, lieutenant of police, caused the arrest of Louis de Vanens, who said he had been an officer. The papers seized on him and on Finette, his mistress, brought to light an association of alchemists, coiners, and magicians, in which priests, officers, important bankers like Cadelan were associated with light women, lackeys, and vagabonds. The Parlement was investigating the matter, when La Reynie put his hand on a second association, like the first to all appearance, but soon to reveal itself to the eyes of the magistrates as an affair of much greater importance still. Towards the end of the year 1678, an advocate in small practice named Maître Perrin was dining in Rue Courtauvilain with a certain Madame Vigoureux, wife of a ladies' tailor--the trade, it will be seen, existed before to-day. The company was merry, and the wine flowed freely. Among the party was a 'big, powerful, large-faced woman,' who choked with laughter as she poured out for herself bumpers of burgundy that would have made a grenadier stagger. Her name was Marie Bosse, and she was the widow of a horse-dealer. She was further a well-known fortune-teller--'devineresse,' as they said in those days. 'A fine trade!' she cried, and spoke of the grand people who frequented her little rookery in the Rue du Grand-Huleu--duchesses and marchionesses and princes and lords. 'Another three poisonings, and she would retire with her fortune made!' At this remark the guests began to laugh still more loudly: this fat woman was irresistibly funny. Maître Perrin alone saw, by a sharp and rapid frown on the face of Madame Vigoureux, that there was something serious in it. He knew Desgrez, the police officer who had arrested Madame de Brinvilliers, and to him he related the incident. Desgrez did not laugh at all, and that very day he sent the wife of one of his archers to the fortune-teller with a complaint against her husband. The fortune-teller, at the first visit, promised her assistance; at the second, she gave her a phial of poison, which the wife at once carried home to her dumfounded husband. La Reynie forthwith ordered the arrest of Madame Vigoureux, of Marie Bosse, with her daughter Manon, and her two sons, one of whom was a soldier in the