That such a hold existed, Aubert's own statement and the desperate attempts made by the Fenayrous to get back these letters, would seem to prove beyond question. Had Aubert consented to return them, would he have saved his life? It seems probable. As it was, he was doomed. Fenayrou hated him. They had had a row on a race-course, in the course of which Aubert had humiliated his former master. More than this, Aubert had boasted openly of his relations with Mme. Fenayrou, and the fact had reached the ears of the husband. Fenayrou believed also, though erroneously, that Aubert had informed against him in the matter of the table-water fraud. Whether his knowledge of Aubert's relations with his wife was recent or of long standing, he had other grounds of hate against his former pupil. He himself had failed in life, but he saw his rival prosperous, arrogant in his prosperity, threatening, dangerous to his peace of mind; he envied and feared as well as hated him. Cruel, cunning and sinister, Fenayrou spent the next two months in the meditation of a revenge that was not only to remove the man he feared, but was to give him a truly fiendish opportunity of satisfying his ferocious hatred.
And the wife what of her share in the business? Had she also come to hate Aubert? Or did she seek to expiate her guilt by assisting her husband in the punishment of her seducer? A witness at the trial described Mme. Fenayrou as "a soft paste" that could be moulded equally well to vice or virtue, a woman destitute of real feeling or strength of will, who, under the direction of her husband, carried out implicitly, precisely and carefully her part in an atrocious murder, whose only effort to prevent the commission of such a deed was to slip away into a church a few minutes before she was to meet the man she was decoying to his death, and pray that his murder might be averted.
Her religious sense, like the images in the hat of Louis XI., was a source of comfort and consolation in the doing of evil, but powerless to restrain her from the act itself, in the presence of a will stronger than her own. At the time of his death Aubert contemplated marriage, and had advertised for a wife. If Mme. Fenayrou was aware of this, it may have served to stimulate her resentment against her lover, but there seems little reason to doubt that, left to herself, she would never have had the will or the energy to give that resentment practical expression. It required the dictation of the vindictive and malevolent Fenayrou to crystallise her hatred of Aubert into a deliberate participation in his murder.
Eight or nine miles north-west of Paris lies the small town of Chatou, a pleasant country resort for tired Parisians. Here Madeleine Brohan, the famous actress, had inhabited a small villa, a two-storied building. At the beginning of 1882 it was to let. In the April of that year a person of the name of "Hess" agreed to take it at a quarterly rent of 1,200 francs, and paid 300 in advance. "Hess" was no other than Fenayrou—the villa that had belonged to Madeleine Brohan the scene chosen for Aubert's murder. Fenayrou was determined to spare no expense in the execution of his design: it was to cost him some 3,000 francs before he had finished with it.
As to the actual manner of his betrayer's death, the outraged husband found it difficult to make up his mind. It was not to be prompt, nor was unnecessary suffering to be avoided. At first he favoured a pair of "infernal" opera-glasses that concealed a couple of steel points which, by means of a spring, would dart out into the eyes of anyone using them and destroy their sight. This rather elaborate and uncertain machine was abandoned later in favour of a trap for catching wolves. This was to be placed under the table, and seize in its huge iron teeth the legs of the victim. In the end simplicity, in the shape of a hammer and sword-stick, won the day. An assistant was taken in the person of Lucien Fenayrou, a brother of Marin.
This humble and obliging individual, a maker of children's toys, regarded his brother the chemist with something like veneration as the gentleman and man of education of the family. Fifty francs must have seemed to him an almost superfluous inducement to assist in the execution of what appeared to be an act of legitimate vengeance, an affair of family honour in which the wife and brother of the injured husband were in duty bound to participate. Mme. Fenayrou, with characteristic superstition, chose the day of her boy's first communion to broach the subject of the murder to Lucien. By what was perhaps more than coincidence, Ascension Day, May 18, was selected as the day for the crime itself. There were practical reasons also. It was a Thursday and a public holiday. On Thursdays the Fenayrou children spent the day with their grandmother, and at holiday time there was a special midnight train from Chatou to Paris that would enable the murderers to return to town after the commission of their crime. A goat chaise and twenty-six feet of gas piping had been purchased by Fenayrou and taken down to the villa.
Nothing remained but to secure the presence of the victim. At the direction of her husband Mme. Fenayrou wrote to Aubert on May 14, a letter in which she protested her undying love for him, and expressed a desire to resume their previous relations. Aubert demurred at first, but, as she became more pressing, yielded at length to her suggestion. If it cost him nothing, Aubert was the last man to decline an invitation of the kind. A trip to Chatou was arranged for Ascension Day, May 18, by the train leaving Paris from the St. Lazare Station, at half-past eight in the evening.
On the afternoon of that day Fenayrou, his wife and his brother sent the children to their grandmother and left Paris for Chatou at three o'clock. Arrived there, they went to the villa, Fenayrou carrying the twenty-six feet of gas-piping wound round him like some huge hunting-horn. He spent the afternoon in beating out the piping till it was flat, and in making a gag. He tried to take up the flooring in the kitchen, but this plan for the concealment of the body was abandoned in favour of the river. As soon as these preparations, in which he was assisted by his two relatives, had been completed, Fenayrou placed a candle, some matches and the sword-stick on the drawing-room table and returned to Paris.
The three conspirators dined together heartily in the Avenue de Clichy—soup, fish, entree, sweet and cheese, washed down by a bottle of claret and a pint of burgundy, coffee to follow, with a glass of chartreuse for Madame. To the waiter the party seemed in the best of spirits. Dinner ended, the two men returned to Chatou by the 7.35 train, leaving Gabrielle to follow an hour later with Aubert. Fenayrou had taken three second-class return tickets for his wife, his brother and himself, and a single for their visitor. It was during the interval between the departure of her husband and her meeting with Aubert that Mme. Fenayrou went into the church of St. Louis d'Antin and prayed.
At half-past eight she met Aubert at the St. Lazare Station, gave him his ticket and the two set out for Chatou—a strange journey Mme. Fenayrou was asked what they talked about in the railway carriage. "Mere nothings," she replied. Aubert abused her mother; for her own part, she was very agitated—tres emotionnee. It was about half-past nine when they reached their destination. The sight of the little villa pleased Aubert.