First of all, it is only right to say that Colonel de Rochas is a savant who seeks nothing but objective truth, and does so with a scientific strictness and integrity that have never been questioned. He puts certain exceptional subjects into an hypnotic sleep, and by means of downward passes makes them trace back the whole course of their existence. He thus takes them successively to their youth, their adolescence, and down to the extreme limits of their childhood. At each of these hypnotic stages the subject reassumes the consciousness, the character, and the state of mind which he possessed at the corresponding stage in his life. He goes over the same events, with their joys and sorrows. If he has been ill, he once more passes through his illness, his convalescence, and his recovery. If, for instance, the subject is a woman who has been a mother, she again becomes pregnant and again suffers the pains of childbirth. Carried back to an age when she was learning to write, she writes like a child, and her writings can be placed side by side with the copy-books which she filled at school. This in itself is very extraordinary, but, as Colonel de Rochas says: Up to the present, we have walked on firm ground; we have been observing a physiological phenomenon which is difficult of explanation, but which numerous experiments and verifications allow us to look upon as certain. We now enter a region where still more surprising enigmas await us. Let us, to come to details, take one of the simplest cases. The subject is a girl of eighteen, called Joséphine. She lives at Voiron, in the department of the Isère. By means of downward passes, she is brought back to the condition of a baby at her mother’s breast. The passes continue, and the wonder-tale runs its course. Joséphine can no longer speak; and we have the great silence of infancy, which seems to be followed by a silence more mysterious still. Joséphine no longer answers except by signs; _she is not yet born_, “she is floating in darkness.” They persist; the sleep becomes heavier; and suddenly, from the depths of that sleep, rises the voice of another being--a voice unexpected and unknown, the voice of a churlish, distrustful, and discontented old man. They question him. At first he refuses to answer, saying that “of course he’s there, as he’s speaking”; that “he sees nothing”; and that “he’s in the dark.” They increase the number of passes, and gradually gain his confidence. His name is Jean-Claude Bourdon; he is an old man; he has long been ailing and bedridden. He tells the story of his life. He was born at Champvent, in the parish of Polliat, in 1812. He went to school until he was eighteen, and served his time in the army with the Seventh Artillery at Besançon; and he describes his gay time there, while the sleeping girl makes the gesture of twirling an imaginary mustache. When he goes back to his native place, he does not marry, but he has a mistress. He leads a solitary