It was in 1491, about the time Jeanne Pothiere was on trial, that it was noticed that young girls in religious communities were subject to an epidemic mental affection, which led its victims to declare that they had fallen into the power of evil spirits. This species of delirium betrayed itself to the eyes of its observers by a series of strange and extravagant acts. These patients at once pretended to be able to read the future and prophesy. (See Calmeil, work cited.) Abusive religious practices, false ideas of the future life, a tendency to mysticism, the fear of Hell and the snares of the Devil, the development of hysterical neurosis, in one subject, into suggestion inherent to imitation; such was the succinct history of the epidemic of the nuns of Cambrai. Jeanne Pothiere, their companion, denounced by them, was condemned to perpetual imprisonment, for having cohabited “434 times” (so the nuns said) with a Demon, and having introduced the lustful devil into their before peaceful convent. For it could have been nothing less than a demon that chased the poor young nuns across the fields and assisted them to climb trees, where, suspended from the branches, they were inspired to divine hidden things, to foretell the future, and be the victims of convulsions. Sixty years later, in 1550, there suddenly occurred a great number of hystero-demonomaniacal epidemics similar to that in the convent of Cambrai. The nuns of Uvertet, following a strict fast, were attacked by divers nervous disorders. During the night they heard groans, when they burst out in peals of hysterical laughter; following this manifestation, they claimed they were lifted out of their beds by a superior force; they had, at the same time, contractions in the muscles of the limbs and of the face. They attacked each other in wild frenzy, giving and taking furious blows; at other times they were found on the ground, as though “inanimate,” and to this species of lethargy succeeded a maniacal agitation of great violence. Like the nuns of Cambrai, they climbed trees and ran over the branches as agile as so many cats, descending head downwards with feet in the air. These manifestations were, of course, attributed to a compact with the Devil, and the officers of the law, acting on the accusations of these nuns, arrested a midwife residing in the neighborhood, on the charge of witchcraft (_sorcery_). It is needless to add that the midwife died soon after.