Poisoners (Secret)
.(1) Locusta, a woman of ancient Rome, who was employed by the Empress Agrippiʹna to poison her husband Claudius. Nero employed the same woman to poison Britannicus and others.
(4) Marquise de Brinvilliers, a young profligate Frenchwoman, taught the art by an officer named Sainte Croix, who learnt it in Italy. (See World of Wonders, part vii. p. 203.)
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(5) Lavoisin and Lavigoreux, French midwives and fortune-tellers.