At a seance, I was one day shown the impression in some plastic substance of a small death’s head; a young man presented it to me as an authentic impression. This appeared abnormal to me, for a death’s head is not a common thing in serious seances, and for my part I have never seen a repugnant or painful phenomenon. An attentive examination revealed to me traces of the finger-tips, which had held the object while it was being pressed on the plastic substance. At another seance at which I was present, one of the experimenters prepared some plates of cement. He placed them himself upon the top of a wardrobe. At the end of the seance finger-prints were found in the cement. These prints had been made while the experimenter was placing the plate on the wardrobe, and, of course, normally made by him. In these two cases, the impressions were distinct and bore no traces of woof. Therefore, such traces are not necessarily indications of fraud, since tricksters do not always use material to preserve themselves from stains, when they make the fraudulent impression. As for photographs, I have never obtained any paranormal ones. It is true I have given no attention to this order of experimentation. I will say nothing about it therefore, since I have no personal fact of interest to relate thereon. The existence of paranormal photography is affirmed by sincere and honourable men, and their experiments deserve to be resumed. The method of operating is simple. The medium is photographed in daylight, when in a state of trance; photography by magnesium light is not to be recommended for many reasons, chiefly because it renders fraud particularly easy of execution. Never use any but your own plates, never let them out of your possession for an instant, change the plates yourself, expose and develop them yourself. I remember one of my friends, a superior military officer, once showed me some extraordinary photographs, on which we saw abnormal forms beside the medium. I told my friend he had been imposed upon. Too honest himself to admit he could be the victim of disloyal trickery, the officer put no faith in my criticisms, and assured me that the photographs had been taken by himself with his own camera, and declared he had not lost sight of the apparatus for a second. His affirmations did not modify my opinion. Later on, when carefully discussing the conditions of the experiment, the officer acknowledged that he had interrupted the seance for lunch, and had left his camera at the medium’s house in the meanwhile.—The latter had taken advantage of his absence either to change the plates and substitute exposed ones, or to make a fraudulent exposure on my friend’s plates. The author of this fraud was, moreover, obliged to acknowledge the imposture. I wonder what motive this young man could have had in cheating! I believe he acted out of pure childishness—having a tendency to hysteria.