the Jardin des Plantes. He was, moreover, a scientist of real merit. Sulphate of potassium, which he discovered, long bore his name. Glaser was the principal, probably the only person who furnished Sainte-Croix and his mistress with poisons. In their correspondence the two lovers call the poisons which they used ‘Glaser’s recipe.’ These poisons, however, as we shall see, were very simple; in these days they would appear clumsy. Exili, who goes out of our story, remained connected with Queen Christina, and in 1681 made an excellent marriage when he wedded the Countess Ludovica Fantaguzzi, cousin of Duke Francis of Modena.

As soon as Sainte-Croix left the Bastille he renewed his relations with the Marquise de Brinvilliers. Her passion had only been heightened by the imprisonment of her lover. Wounded in her pride, she felt the birth within herself of an implacable and violent hatred of her father. Her dissipations, her gaming, her wild flings in her lover’s company (she paying expenses, after the fashion of that period), had embarrassed her fortune. ‘I accuse myself,’ she said in her confession, ‘of having given a great deal of my wealth to this man, and he ruined me.’ The desire of attaining possession of her paternal inheritance, and the yearning, growing day by day more imperious, for wreaking vengeance on her father for the affront put upon her, suggested to her a frightful crime. There might frequently have been seen, drawing up at the market-square of Saint-Germain, a carriage from which alighted a young officer and a fashionable lady. They went on foot to the Rue du Petit-Lion, in which Glaser the chemist lived. Arrived at his house, they sought a retired room. The neighbours, puzzled by these strange goings-on, spoke of false money. Soon this young lady might have been seen, under the edifying appearance of piety and religion, going into the hospitals; she bent over the beds of the patients with words of gentleness and affection; she carried them confections, wine, and biscuits; but the patients whom she approached inevitably succumbed, ere long, in horrible anguish. ‘Who would have dreamt,’ writes Nicolas de la Reynie, the lieutenant of police, ‘that a woman brought up in a respectable family, whose form and constitution were delicate and who in appearance was sweet-natured, would have made an amusement of going to the hospitals to poison the patients, for the purpose of observing the different effects of the poison she gave them?’ She poisoned her own servants, too, ‘to try experiments.’ ‘Françoise Roussel says that she has been in the service of Lady Brinvilliers. The latter one day gave her some preserved gooseberries to eat, on the point of a knife, and soon afterwards she felt ill; she gave her also a moist slice of ham, which she ate, and since then she has had severe abdominal pains, feeling as though her heart were being stabbed.’ The poor woman was ill for three years.

When the marquise had tested the strength of ‘Glaser’s recipe,’ and had noted the inability of the surgeons to discover traces of poison in the corpses, the poisoning of her father was resolved on.

As Whitsuntide drew on in the year 1666, Antoine Dreux d’Aubray, who had been suffering for some months from strange disorders, set out for his estates at Offémont, a few leagues from Compiègne. He asked his daughter to bring her children and spend a few weeks with him, and when she arrived he scolded her affectionately for having been so long in coming. On the day after her arrival his sickness was redoubled; ‘he had great vomitings, continuing with increasing violence till his death,’ which occurred at Paris, whither he had himself transported in order to secure the services of the best physicians, and whither his daughter had not failed to accompany him. Madeleine de Brinvilliers confessed afterwards that she had poisoned her father twenty-eight or thirty times with her own hands, and at other times by the hands of a lackey named Gascon, presented to her by Sainte-Croix. The poison was given both in water and in powder, and the process lasted eight months. ‘She could not manage it,’ she said. It is clear that the poison she employed was simply arsenic. When in the course of time the facts were known, all Europe clamoured with indignation at the thought of this woman heaping caresses on her dying father, and responding to his embraces by pouring poison into the medicines she handed him with her engaging smile. ‘The greatest crimes,’ said Madame de Sévigné, ‘are a mere trifle in comparison with being eight months poisoning her father and receiving all his caresses and tendernesses, to which she replied by doubling the dose. Medea was nothing to her.’

D’Aubray died at Paris on September 10, 1666, aged sixty-six years. The physicians who made an autopsy of the body attributed death to natural causes; but the rumour at once got abroad that he had died of poison. The elder brother of the marquise, whose name was the same as his father’s, succeeded him in the family estates and the office of civil lieutenant.

Delivered thus from a formidable censor, Madame de Brinvilliers no longer put any restraint on her debaucheries. She had several lovers at once, in addition to Sainte-Croix. By him she had ‘two children among her own'; she was the mistress of F. de Pouget, Marquis de Nadaillac, captain of light horse, and cousin of her husband. Another lover was a cousin of her own, by whom she had a child. Finally, she granted her favours to a mere youth, her children’s tutor, of whom there will be much more to say. In spite of this, she felt keenly irritated when Sainte-Croix appeared to be unfaithful to her; and when she learnt that her husband was keeping a woman named Dufay, in her rage she thought of stabbing her. ‘She had naturally a great delicacy of feeling,’ her confessor was to write of her, ‘and was highly sensitive on a point of honour and in regard to injuries.’

Her expenses and prodigalities redoubled, and it was not long before her share of her father’s wealth had melted away. At this point occurs an incident which bears witness at once to the distress into which she had fallen and to the savage energy of her character. In 1670, a property belonging to herself and her husband at Norat, was sold by order of the Court to satisfy their creditors; in her ungovernable fury the marquise attempted to set the place on fire.

The greater part of her father’s estate had come to her two brothers, one of whom had been appointed civil lieutenant, as we have seen; the other was councillor to the Court. Madame de Brinvilliers had already tried to procure the assassination of the elder by two hired bravoes on the road to Orleans—one of those audacious strokes which to the end of her days she never ceased to devise. She declared at this moment that her brother was ‘no good.’ Pressed by need of money, she ‘resolved on fresh poisonings so as not to lose the fruits of the first.’ Sainte-Croix was fully agreed as to the necessity of the proceedings; but before he set about carrying them into effect he got from his mistress two promissory notes, one for 25,000, the other for 30,000 livres.

In 1669, Madame de Brinvilliers succeeded in introducing a wretch named Jean Hamelin, commonly known as La Chaussée, into her brother the councillor’s household as a footman. The two brothers lived in the same house, and La Chaussée had every facility for giving poison to both. One day when he was waiting at table, the dose he put into the glass he was handing was so strong that the civil lieutenant rose up in great agitation, crying, ‘Ah, wretch, what have you given me? I think you want to poison me!’ And he bade his secretary taste the stuff. The latter took some on a spoon and declared that he detected a strong taste of vitriol. La Chaussée did not lose his head. ‘No doubt it is the glass