1. Let me observe, in the first place, that Eusapia frequently releases her hand for no other reason than to touch her head, which is in pain at the moment of the manifestations. It is a natural reflex movement; and, in her case, it is a fixed habit. Since, more often than not, she does not notice that she is doing it, or at least fails to give warning to her controller, the darkness justifies suspicions. 2. Immediately before the mediumistic doubling of her personality, her hand is affected with hyperaesthesia and, consequently, the pressure of the hand of another makes her ill, especially in the dorsal quarter. She then most frequently places the hand which is to be mediumistically active _above_ and not below that of the controller, trying to touch it as little as possible. When the doubling of the personality is complete, and the dynamic hand more or less materialized, that of the medium contracts and rests heavily upon the controller, exactly at the moment that the phenomenon takes place. She is then almost insensible and all shrunken together. In very good mediumistic conditions the doubling is easy and the initial hyperaesthesia of short duration. In this case the medium allows her hand to be completely covered and the feet of the controllers to be _upon_ hers, as was always the case in our seances at Rome in 1893; but, since that time, she can no longer endure that position, and rather prefers to be held by hands under the table. 3. In accordance with psychological laws, the hand always proceeds automatically in the direction of our thoughts (Cumberlandism). The medium acts by auto-suggestion, and the order to go as far as an indicated point is given by her brain simultaneously to the dynamic hand and the corporeal hand, since in the normal state they form only one. And since, immediately after the hyperaesthesia, the muscular sensation is excited and the hand grows benumbed, it sometimes happens (especially when the medium proceeds carelessly and does not properly govern her movements) that the dynamic hand remains in place, while her own hand goes in the indicated direction. The former, not being yet materialized, produces only a semblance of pressure; and another person, able to see a little in the darkness, will perceive nothing of it, and will even be able to ascertain by touch the absence of the medium's hand from that of the controller. At the same time the hand of the medium is going in the direction of the object; and _still it may happen that it does not really reach it, acting, as it does, at a distance, by a dynamic prolongation_.