It is held that so long as the astral form is not entirely separated from the body there is a liability that it may be forced by magnetic attraction to re-enter it. Sometimes it will be only half-way out when the corpse, which presents the appearance of death, is buried. In such cases the astral body voluntarily re-enters the mortal frame, and then one of two things happens—either the unhappy victim will writhe in the agonising torture of suffocation, or if he has been grossly material he becomes a vampire. It is held that this ethereal form can go wherever it pleases, and that it is possible for this astral body to feed on human victims and carry the sustenance to the corpus lying within the tomb by means of an invisible cord of connection, the nature of which is at present unknown; but psychical researchers—and these number many eminent scientists—have of late years devoted their efforts towards the elucidation of the phenomenon known as the projection of the double; and this, if scientifically and satisfactorily explained, will give the clue to many of the phenomena of vampirism. This “double” may sometimes during life be projected unconsciously, and sometimes purposely, by means of hypnotism or provoked somnambulism. An example of the former appeared in the _Journal du Magnétisme_ for October 1909, and the translation of the account was published in the _Annals of Psychical Science_ for January-March 1910, and is here reproduced. The narrator is M. Antonio Salazar of Mexico. “_A Romantic Case of Projection of the Double_ “In 1889 I lived at Juatlahuaca, in the state of Oaxaca, Mexico. For a long time I passionately loved the woman who afterwards became my wife. “At the beginning of 1890, through one of those unfortunate disagreements which occasionally arise between parents and their children, those of my beloved one, wishing to put an end to our mutual love, separated us by taking her to the mountains; but this only increased our love, because of the difficulties and our desire to see each other. “Several months passed after our separation, and though the distance between us was not great, we had to take into account the vigilance with which she was surrounded, and which was a greater obstacle than the difficulties of the road. “One night, when I was feeling, as usual, very sad and gloomy, the thought came to me to say to my servant: ‘Jeanette, if any morning you come into my room and do not find me, do not look for me; take the keys and open the shop. If at midday I have not arrived, you can seek for me in the mountains.’ “‘Ah, sir,’ she replied, ‘I would never oppose myself to your commands, if what you tell me did not concern persons whom I love and respect, because you will never thereby accomplish your object.’