On the other hand, I cannot consider these visions as hallucinations, unless I also admit that this entoptic hallucination is collective. But then, why are not these illusions met with in other seances? Why is the manifestation of lights or forms accompanied by abundant raps without contact? These raps immediately precede the apparition of the forms, and behave as though they were signals destined to draw the attention of the observers. This is a coincidence which is not fortuitous, for it is almost constant. The first time that a more or less definite form was observed with this medium, no seance was being held. The medium saw on the wall the apparition of one of his ‘personifications,’ and the word _curtain_ traced in luminous letters. The sensitive could not interpret the meaning of this word, for he had never been present at any spiritistic seance. I told him to continue observing, for I thought I understood the meaning of this message. I immediately arranged, as well as I could, a kind of cabinet in a corner of the room with the help of some black curtains. We darkened the room and sat down before a table, the medium having his back turned to the cabinet. In a short time we heard raps on the table, the medium’s chair, the floor, and on the wall inside the cabinet. The medium, interested, turned half round towards the cabinet, when all at once, after the production of some very faint, flitting lights, I perceived the beautiful face of a woman, pale, the eyes up-raised as though in prayer. The eyes and hair were black; the hair was parted in the centre and dressed in the style of fifty or sixty years ago. The face was draped in a white veil which also covered the head, forming a kind of frame for the face. The physiognomy was of the sweetest, and of rare beauty. The apparition appeared to be slightly luminous, of a whitish, milky hue. It showed itself to the left of the medium, but high above him, near the ceiling. It remained visible for a very short time. Prudently interrogated, the medium gave me the exact description of the face I had just perceived. The details concorded in every way. Inquiry as to who it was elicited the information, given in raps, that it was the face of one of the group of four fairies of whom I spoke on page 81.