According to such high authorities as Hufeland and others, magnetic sleep enables persons to see the interior of the bodies of others. He himself heard one of his female patients, a woman without any knowledge of anatomy, describe quite accurately the inner structure of the ear, and of certain other parts of the body. (_Ueber Sympathie_, p. 115.) It seems to have been well ascertained that she had never had an opportunity of reading such a description, even if her memory had been retentive enough to enable her to recall and recite what she had thus chanced to read. The clairvoyant Alexis once saw through the clothing of a visitor a scar, and after gazing at it--in his sleep--for a long time, he came to the conclusion that it was the effect of a dog's bite, and finally stated all the facts attending the accident of which the scar was the sole remaining evidence. Even historical predictions made in magnetic sleep are not wanting. The death of a king of Würtemberg was thus foretold by two somnambulists, who were under medical treatment, and who warned their physicians, well-known and trustworthy practitioners of good standing, of the approaching event. The king's death took place without being preceded by any serious illness, and in the manner minutely predicted by one of the patients; a confirmation which was all the more striking, as the prediction had been made in the presence of a number of distinguished men, among whom were a minister of the kingdom and several divines. Another case is that of the Swedish king, Gustavus Vasa, who was assassinated in 1792, by Ankarström. Accompanied by his physician, he once called, as Count Haga, upon a patient treated by Aubry, a pupil of Mesmer. She recognized him immediately, although plunged in magnetic sleep, told him that he suffered of oppressions of the chest, the effect of a broken arm, and foretold him that his life was in danger and that he would be murdered. The king was deeply impressed, and as his physician expressed doubt and contempt in his face, he desired that the latter should be put _en rapport_ with the patient. No sooner was this done than the physician's eyes fell, he sank into magnetic sleep, and when, after some time, he was aroused he left the room in great agitation. (A. Gauthier. _Hist. du Somnamb._, ii. p. 246.)