Meanwhile the elder d'Aubray became worse and worse; he could take no sustenance, and vomited incessantly. The three last days of his life he felt a fire in his stomach, which seemed to be consuming its very substance. At length he expired on the 17th of June 1670. On being opened, his stomach and _duodenum_ were black, and falling to pieces, as if they had been put on a large fire; and the liver was burnt up and gangrened. It was evident that he had been poisoned: but on whom could suspicion fall?--there was no clue whatever to guide it. The marchioness had gone to the country. St. Croix wrote her that the magistrate was dead, and that, from his brother's situation, he must soon follow. It so turned out. The unfortunate counsellor died, after having lingered three months in excruciating torments; and he was so far from suspecting La Chaussée of any hand in his death, that he left him a legacy of three hundred livres, which was paid. These three murders were still insufficient. There was yet a sister who kept from the marchioness the half of the successions which she wished to gain by the death of her father and brothers. The sister's life was repeatedly attempted in the same way; but the shocking occurrences in her family had made her suspicious, and her precautions preserved her. The poor Marquis de Brinvillier was intended by his fury of a wife for her next victim. "Madame de Brinvillier," says Madame de Sevigné in another of her letters, "wanted to marry St. Croix, and for that purpose poisoned her husband repeatedly. But St. Croix, who had no desire to have a wife as wicked as himself, gave the poor man antidotes; so that, having been tossed backward and forward in this way, sometimes poisoned, and sometimes _un_poisoned, (_désempoisonné_), he has, after all, got off with his life." Though everybody was convinced that the father and his two sons had been poisoned, yet nothing but very vague suspicions were entertained as to the perpetrators of the crime. Nobody thought of St. Croix as having had anything to do with it. He had for a long time ceased, to all appearance, to have any connexion with Madame de Brinvillier; and La Chaussée, the immediate agent, had played his part so well, that he was never suspected.