On August 22 the civil lieutenant summoned Madame de Brinvilliers and Pennautier to appear at the examination of the documents found in the box. Pennautier was in the country; the marchioness was represented by her attorney, who repeated his protests. A third personage appeared on the scene, namely, La Chaussée. He fancied his audacity would save him, and from the first had opposed the sealing of the house, on the ground that he had deposited with the deceased, in whose service he had been for seven years, 200 pistoles and 100 silver crowns which should be, he said, behind the window of the study in a bag, with a note proving that the money belonged to him. He claimed also a number of papers, which he described. The knowledge that La Chaussée displayed of Sainte-Croix' laboratory awakened suspicion. When Commissary Picard told the whilom valet that the confiscated box had just been opened, he stood petrified with confusion for a moment, then fled precipitately, leaving the commissary in open-eyed amazement. The same day he left Gaussin, a bath-proprietor whose service he had entered, and, concealing himself during the day, roamed about Paris at night-time till he was arrested on September 4 at six o'clock in the morning by a police officer named Thomas Regnier. La Chaussée was very crestfallen as he walked down the street. From that moment the gravest suspicions were entertained against Madame de Brinvilliers, but there was a reluctance to arrest her because of her rank. Regnier repaired to Picpus and told her bluntly that he had found La Chaussée, and that he had learned a good many things from the commissary. The marchioness blushed. 'What is it, madam? You say nothing?' But the lady, changing the subject, asked him to escort her to mass. When they returned, she spoke to him again about the box. She seemed a prey to uneasiness. 'But madam,' said Regnier, 'surely you are not mixed up in this business?' 'Why should I be?' she replied. 'That villain La Chaussée, when with Commissary Picard, must have said something against you, and would say it again if he was captured.' 'It would be well to take the villain to Picardy,' said the marchioness. She said also that she had long been pressing Sainte-Croix to return the box, and that Pennautier was involved with herself in the matter. Regnier left Madame de Brinvilliers and went to find Briancourt at Vertus. He told him, to begin with, that he had arrested La Chaussée, and Briancourt exclaimed, 'Then she is a lost woman!' He went on to speak of the poison which she had often talked about, and said that she had several sorts of it in her house.