All the same, though proof was wanting, his enormities were so well accredited that there was no scruple as to having him arrested.Awarrant was out against him: Exili was taken up, and was lodged in the Bastille.He had been there about six months when Sainte-Croix was brought to the same place.The prisoners were numerous just then, so the governor had his new guest put up in the same room as the old one, mating Exili and Sainte-Croix, not knowing that they were a pair of demons.Our readers now understand the rest.Sainte-Croix was put into an unlighted room by the gaoler, and in the dark had failed to see his companion: he had abandoned himself to his rage, his imprecations had revealed his state of mind to Exili, who at once seized the occasion for gaining a devoted and powerful disciple, who once out of prison might open the doors for him, perhaps, or at least avenge his fate should he be incarcerated for life.
The repugnance felt by Sainte-Croix for his fellow-prisoner did ,not last long, and the clever master found his pupil apt.Sainte-Croix, a strange mixture of qualities good and evil, had reached the supreme crisis of his life, when the powers of darkness or of light were to prevail.Maybe, if he had met some angelic soul at this point, he would have been led to God; he encountered a demon, who conducted him to Satan.
Exili was no vulgar poisoner: he was a great artist in poisons, comparable with the Medici or the Borgias.For him murder was a fine art, and he had reduced it to fixed and rigid rules: he had arrived at a point when he was guided not by his personal interest but by a taste for experiment.God has reserved the act of creation for Himself, but has suffered destruction to be within the scope of man:
man therefore supposes that in destroying life he is God's equal.
Such was the nature of Exili's pride: he was the dark, pale alchemist of death: others might seek the mighty secret of life, but he had found the secret of destruction.
For a time Sainte-Croix hesitated: at last he yielded to the taunts of his companion, who accused Frenchmen of showing too much honour in their crimes, of allowing themselves to be involved in the ruin of their enemies, whereas they might easily survive them and triumph over their destruction.In opposition to this French gallantry, which often involves the murderer in a death more cruel than that he has given, he pointed to the Florentine traitor with his amiable smile and his deadly poison.He indicated certain powders and potions, some of them of dull action, wearing out the victim so slowly that he dies after long suffering; others violent and so quick, that they kill like a flash of lightning, leaving not even time for a single cry.Little by little Sainte-Croix became interested in the ghastly science that puts the lives of all men in the hand of one.He joined in Exili's experiments; then he grew clever enough to make them for himself; and when, at the year's end, he left the Bastille, the pupil was almost as accomplished as his master.
Sainte-Croix returned into that society which had banished him, fortified by a fatal secret by whose aid he could repay all the evil he had received.Soon afterwards Exili was set free--how it happened is not known--and sought out Sainte-Croix, who let him a room in the name of his steward, Martin de Breuille, a room situated in the blind, alley off the Place Maubert, owned by a woman called Brunet.
It is not known whether Sainte-Croix had an opportunity of seeing the Marquise de Brinvilliers during his sojourn in the Bastille, but it is certain that as soon as he was a free man the lovers were more attached than ever.They had learned by experience, however, of what they had to fear; so they resolved that they would at once make trial of Sainte-Croix's newly acquired knowledge, and M.d'Aubray was selected by his daughter for the first victim.At one blow she would free herself from the inconvenience of his rigid censorship, and by inheriting his goods would repair her own fortune, which had been almost dissipated by her husband.But in trying such a bold stroke one must be very sure of results, so the marquise decided to experiment beforehand on another person.Accordingly, when one day after luncheon her maid, Francoise Roussel, came into her room, she gave her a slice of mutton and some preserved gooseberries for her own meal.The girl unsuspiciously ate what her mistress gave her, but almost at once felt ill, saying she had severe pain in the stomach, and a sensation as though her heart were being pricked with pins.But she did not die, and the marquise perceived that the poison needed to be made stronger, and returned it to Sainte-Croix, who brought her some more in a few days' time.
The moment had come for action.M.d'Aubray, tired with business, was to spend a holiday at his castle called Offemont.The marquise offered to go with him.M.d'Aubray, who supposed her relations with Sainte-Croix to be quite broken off, joyfully accepted.Offemont was exactly the place for a crime of this nature.In the middle of the forest of Aigue, three or four miles from Compiegne, it would be impossible to get efficient help before the rapid action of the poison had made it useless.