they are, be thwarted in this point by any persons, I charge their consciences with it, both in this world and that which is to come, in order that I may unload mine. I protest that this is my last will. Done at Paris, May 25, 1672.(Signed) Sainte Croix."
This earnest solicitation, instead of insuring respect, as was intended, excited curiosity. The box was opened, and found to contain some papers, and several vials and powders. The latter were handed to a chemist for analysis, and the documents were retained by the police, and opened. Among them was found a promissory note of the Marchioness de Brinvilliers, for thirty thousand francs, to the order of Sainte Croix. The other papers were of greater importance, as they implicated both her and her servant, La Chaussée, in the recent murders. As soon as she was informed of the death of Sainte Croix, she made an attempt to gain possession of his papers and the box; but, being refused, she saw that there was no time to be lost, and immediately quitted. Next morning the police were on her trail; but she succeeded in escaping to England. La Chaussée was not so fortunate. Altogether ignorant of the fatal mischance which had brought his villanies to light, he did not dream of danger. He was arrested and brought to trial: being put to the torture, he confessed that he had administered poison to the Messieurs d'Aubray, and that he had received a hundred pistoles, and the promise of an annuity for life, from Sainte Croix and Madame de Brinvilliers, for the job. He was condemned to be broken alive on the wheel, and the marchioness was, by default, sentenced to be beheaded. He was executed accordingly, in March 1673, on the Place de Grève, in Paris.
La Brinvilliers appears to have resided for nearly three years in England. Early in 1676, thinking that the rigour of pursuit was over, and that she might venture to return to the Continent, she proceeded secretly to Liège. Notwithstanding her care, the French authorities were soon apprised of her return; and arrangements were promptly made with the municipality of that city to permit the agents of the French police to arrest her within the limits of their jurisdiction. Desgrais, an officer of the maréchaussée, accordingly left Paris for that purpose. On his arrival in Liège, he found that she had sought shelter within the walls of a convent. Here the arm of the law, long as it is said to be, could not reach her: but Desgrais was not a man to be baffled, and he resorted to stratagem to accomplish what force could not. Having disguised himself as a priest, he sought admission to the convent, and obtained an interview with La Brinvilliers. He said, that being a Frenchman, and passing through Liège, he could not leave that city without paying a visit to a lady whose beauty and
