No money had ever reached Lebret. His honesty and good faith were demonstrated beyond any shadow of a doubt; no copy of any will of Hippolyte Ballet had ever been in his possession. But Castaing had shown Auguste Ballet a copy of his brother's will, the seals of which Auguste had shown to his mistress. In all probability, and possibly at the instigation of Castaing, Hippolyte Ballet had made a will, leaving the greater part of his property to his sister. Somehow or other Castaing had got possession of this will. On his death Castaing had invented the story of Mme. Martignon's bribe to Lebret, and so persuaded Auguste to outbid her. He had ingeniously kept Auguste and Lebret apart by representing Lebret as refusing to deal direct with Auguste, and by these means had secured to his own use the sum of 100,000 francs, which Auguste believed was being paid to Lebret as the price of his alleged destruction of his brother's will. The plot was ingenious and successful. To Lebret and the Martignons Castaing said that Hippolyte had made a will in Mme. Martignon's favour, but had destroyed it himself some days before his death. The Martignons expressed themselves as glad that Hippolyte had done so, for they feared lest such a will should have provoked resentment against them on the part of Auguste. By keeping Auguste and Lebret apart, Castaing prevented awkward explanations. The only possible danger of discovery lay in Auguste's incautious admissions to his mistress and friends; but even had the fact of the destruction of the will come to the ears of the Martignons, it is unlikely that they would have taken any steps involving the disgrace of Auguste.
Castaing had enriched himself considerably by the opportune death of his friend Hippolyte. It might be made a matter of unfriendly comment that, on the first day of May preceding that sad event, Castaing had purchased ten grains of acetate of morphia from a chemist in Paris, and on September 18, less than a month before Hippolyte's death, he had purchased another ten grains of acetate of morphia from the same chemist. The subject of poisons had always been a favourite branch of Castaing's medical studies, especially vegetable poisons; morphia is a vegetable poison.
Castaing's position relative to Auguste Ballet was now a strong one. They were accomplices in the unlawful destruction of Hippolyte's will. Auguste believed it to be in his friend's power to ruin him at any time by revealing his dealings with Lebret. But, more than that, to Auguste, who believed that his 100,000 francs had gone into Lebret's pocket, Castaing could represent himself as so far unrewarded for his share in the business; Lebret had taken all the money, while he had received no recompense of any kind for the trouble he had taken and the risk he was encountering on his friend's behalf. Whatever the motive, from fear or gratitude, Auguste Ballet was persuaded to make a will leaving Dr. Edme Samuel Castaing the whole of his fortune, subject to a few trifling legacies. But Auguste's feelings towards his sole legatee were no longer cordial. To one or two of his friends he expressed his growing distaste for Castaing's society.
Dr. Castaing can hardly have failed to observe this change. He knew Auguste to be reckless and extravagant with his money; he learnt that he had realised another 100,000 francs out of his securities, and that he kept the money locked up in a drawer in his desk. If Auguste's fortune were dissipated by extravagance, or he revoked his will, Castaing stood to lose heavily. As time went on Castaing felt less and less sure that he could place much reliance on the favourable disposition or thrift of Auguste. The latter had fallen in love with a new mistress; he began to entertain expensively; even if he should not change his mind and leave his money away from Castaing, there might very soon be no money to leave. At the end of May, 1823, Castaing consulted a cousin of his, Malassis, a notary's clerk, as to the validity of a will made by a sick man in favour of his medical attendant. He said that he had a patient gravely ill who, not wishing to leave his money to his sister, whom he disliked, intended to leave it to him. Malassis reassured him as to the validity of such a will, and gave him the necessary instructions for preparing it. On May 29 Castaing sent Malassis the will of Auguste Ballet with the following note, "I send you the will of M. Ballets examine it and keep it as his representative." The will was dated December 1, 1822, and made Castaing sole legatee. On the same day that the will was deposited with Malassis, Castaing and Auguste Ballet started to-gether on a little two days' trip into the country. To his friends Auguste seemed in the best of health and spirits; so much so that his housekeeper remarked as he left how well he was looking, and Castaing echoed her remark, saying that he looked like a prince!
During the afternoon the two friends visited Saint Germain, then returned to Paris, and at seven o'clock in the evening arrived at the Tete Noire Hotel at Saint Cloud, where they took a double-bedded room, Castaing paying five francs in advance. They spent the following day, Friday, May 30, in walking about the neighbourhood, dined at the hotel at seven, went out again and returned about nine o'clock. Soon after their return Castaing ordered some warmed wine to be sent up to the bedroom. It was taken up by one of the maid-servants. Two glasses were mixed with lemon and sugar which Castaing had brought with him. Both the young men drank of the beverage. Auguste complained that it was sour, and thought that he had put too much lemon in it. He gave his glass to the servant to taste, who also found the drink sour. Shortly after she left the room and went upstairs to the bedside of one of her fellow-servants who was ill. Castaing, for no apparent reason, followed her up and stayed in the room for about five minutes. Auguste spent a bad night, suffering from internal pains, and in the morning his legs were so swollen that he could not put on his boots.
Castaing got up at four o'clock that morning and asked one of the servants to let him out. Two hours later he drove up in a cabriolet to the door of a chemist in Paris, and asked for twelve grains of tartar emetic, which he wanted to mix in a wash according to a prescription of Dr. Castaing. But he did not tell the chemist that he was Dr. Castaing himself. An hour later Castaing arrived at the shop of another chemist, Chevalier, with whom he had already some acquaintance; he had bought acetate of morphia from him some months before, and had discussed with him then the effects of vegetable poisons. On this particular morning he bought of his assistant thirty-six grains of acetate of morphia, paying, as a medical man, three francs fifty centimes for it instead of the usual price of four francs. Later in the morning Castaing returned to Saint Cloud, a distance of ten miles from Paris, and said that he had been out for a long walk. He found Auguste ill in bed. Castaing asked for some cold milk, which was taken up to the bedroom by one of the servants. Shortly after this Castaing went out again. During his absence Auguste was seized with violent pains and sickness. When Castaing returned he found his friend in the care of the people of the hotel. He told them to throw away the matter that had been vomited, as the smell was offensive, and Auguste told them to do as his friend directed. Castaing proposed to send for a doctor from Paris, but Auguste insisted that a local doctor should be called in at once.
Accordingly Dr. Pigache of Saint Cloud was summoned. He arrived at the hotel about eleven o'clock. Before seeing the patient Castaing told the doctor that he believed him to be suffering from cholera. Pigache asked to see the matter vomited but was told that it had been thrown away. He prescribed a careful diet, lemonade and a soothing draught.
Dr. Pigache returned at three o'clock, when he found that the patient had taken some lemonade, but, according to Castaing, had refused to take the draught. He called again that afternoon. Ballet was much better; he said that he would be quite well if he could get some sleep, and expressed a wish to return to Paris. Dr. Pigache dissuaded him from this and left, saying that he would come again in the evening. Castaing said that that would be unnecessary, and it was agreed that Pigache should see the patient again at eight o'clock the next morning. During the afternoon Castaing sent a letter to Paris to Jean, Auguste's negro servant, telling him to take the two keys of his master's desk to his cousin Malassis. But the negro distrusted Castaing. He knew of the will which his master had made in the doctor's favour. Rather than compromise himself by any injudicious act, he brought the keys to Saint Cloud and there handed them over to Castaing.
When Jean arrived his master complained to him of feeling very ill. Jean said that he hoped he would be well enough to go back to Paris the following day, to which Auguste replied, "I don't think so. But if I am lucky enough to get away to-morrow, I shall leave fifty francs for the poor here." About eleven o'clock that night Castaing, in Jean's presence, gave the sick man a spoonful of the draught prescribed by Dr. Pigache. Four or five minutes later Auguste was seized with terrible convulsions, followed by unconsciousness. Dr. Pigache was sent for. He found Ballet lying on his back unconscious, his throat strained, his mouth shut and his eyes fixed; the pulse was weak, his body covered with cold sweat; and every now and then he was seized with strong convulsions. The doctor asked Castaing the cause of the sudden change in Ballet's condition. Castaing replied that it had commenced shortly after he had taken a spoonful of the draught which the doctor had prescribed for him. Dr. Pigache bled the patient and applied twenty leeches. He returned about six; Ballet was sinking, and Castaing appeared to be greatly upset. He told the doctor what an unhappy coincidence it was that he should have been present at the deathbeds of both Hippolyte and his brother Auguste; and that the position was the more distressing for him as he was the sole heir to Auguste's fortune. To M. Pelletan, a professor of medicine, who had been sent for to St. Cloud in the early hours of Sunday morning, Castaing appeared to be in a state of great grief and agitation; he was shedding tears. Pelletan was from the first impressed by the suspicious nature of the case, and pointed out to Castaing the awkwardness of his situation as heir to the dying man. "You're right," replied Castaing, "my position is dreadful, horrible. In my great grief I had never thought of it till now, but now you make me see it clearly. Do you think there will be an investigation?" Pelletan answered that he should be compelled to ask for a post-mortem. "Ah! You will be doing me the greatest service," said Castaing, "I beg you to insist on a post-mortem. You will be acting as a second father to me in doing so." The parish priest was sent for to administer extreme unction to the dying man. To the parish clerk who accompanied the priest Castaing said, "I am losing a friend of my childhood," and both priest and clerk went away greatly edified by the sincere sorrow and pious demeanour of the young doctor. About mid-day on Sunday, June 1, Auguste Ballet died.
During the afternoon Castaing left the hotel for some hours, and that same afternoon a young man about twenty-five years of age, short and fair, left a letter at the house of Malassis. The letter was from Castaing and said, "My dear friend, Ballet has just died, but do nothing before to-morrow, Monday. I will see you and tell you, yes or no, whether it is time to act. I expect that his brother-in-law, M. Martignon, whose face is pock-marked and who carries a decoration, will call and see you. I have said that I did not know what dispositions Ballet may have made, but that before his death he had told me to give you two little keys which I am going to deliver to you myself to-morrow, Monday. I have not said that we are cousins, but only that I had seen you once or twice at Ballet's, with whom you were friendly. So say nothing till I have seen you, but whatever you do, don't say you are a relative of mine." When he returned to the hotel Castaing found Martignon, Lebret, and one or two friends of Auguste already assembled. It was only that morning that Martignon had received from Castaing any intimation of his brother-in-law's critical condition. From the first Castaing was regarded with suspicion; the nature of the illness, the secrecy maintained about it by Castaing, the coincidence of some of the circumstances with those of the death of Hippolyte, all combined to excite suspicion. Asked if Auguste had left a will Castaing said no; but the next day he admitted its existence, and said that it was in the hands of Malassis.