‘The dish containing the plastic clay is put in the centre of the table. Almost immediately the dish, which weighs nearly four lbs., is lifted up and placed in equilibrium on the left arm of M. de Rochas, whose left hand continues to hold Eusapia’s right hand. M. de Rochas feels three distinct, successive pressures of the dish resting on his arm; then a friendly pressure on the back of his arm apprises him, that the phenomenon is accomplished. We carry the dish away at once, and in the daylight we see finger-prints in the clay; the prints look as though the fingers had been enveloped in some material of fine texture, the woof being distinctly visible in the clay.’ I did not observe this fact with enough precision to be able to retain it as a demonstrated fact. I point it out, nevertheless, because it permits one to preserve the material trace of the phenomenon. Other observers have obtained better imprints with Eusapia. I have seen some which represent a distorted likeness of the medium’s face. I think this phenomenon ought to be observed with care, if one has the occasion to meet with mediums capable of producing it. I will point out the following fact to the attention of possible observers: the almost constant presence of a kind of woof, as if the object which made the impression was covered with thin gauze. This circumstance is at first sight suspicious; but here, again, as always when we are in presence of these unfamiliar manifestations, we must not be in too great a hurry to conclude in fraud, and say that the medium put a wet piece of gauze over face and hands, in order to avoid soiling the loam and bearing tell-tale traces of cheating. But I recognise that this is the explanation which ought to present itself before any other; and we must not put it to one side, unless we have sufficient reasons for doing so. At the same time, we must not jump to the conclusion of fraud solely because of this gauzy appearance. There is something interesting in the presence of this gauze. The faces I have seen were all framed in a sort of milky-looking veil. Personally, I have rarely seen faces free of this. I have not observed it around material objects nor around animals’ heads. Neither do I observe it in hypnagogic illusions. I will point out the following observation of MM. Brincard and Béchade on the subject:— ‘M. de Rochas feels himself touched on the face as though by a beard, and sees standing out in relief, against the part of the room best lighted up by the window, a long black lock of wavy hair. MM. Brincard and Béchade have the sensation that their heads are enveloped in transparent black gauze, which seems to fall on to their shoulders; it disappears before they have time to seize it.’ I did not notice these traces of tissue, with the undoubtedly fraudulent impressions which have been shown me or done in my presence. I am going to give an example, to show how an attentive examination can reveal fraud.