On the other hand, since the medium constantly seeks to release one hand (generally her left hand) from the control designed to hinder her from doing so, a certain number of the touches felt and of the displacements of objects may be due to a substitution of hands. This behavior of hers will be the subject of a special examination in the following chapter. But it would be impossible by the whole force of the hand to produce the violent movement of the curtain, which seems to be inflated by a tempestuous wind, and projected to the very centre of the table, forming a great hood around the heads of the sitters. To fling out the curtain with such force, it would be necessary for the medium to rise and push on it as hard as she could with her extended arms--not once merely, but again and again. But how can she do this when she is all the while seated tranquilly in her chair? These experiments place us in a special environment or atmosphere, on the different physical and psychical characters of which it is difficult to form an opinion. At the time of the last seance, during which M. and Mme. Pallotti are sure of having seen, touched, and embraced their daughter, I saw nothing, at that moment, of this spectral form, although it was only a few yards from me, and although I had perceived, some moments before, the head of a young girl. It is true that, out of respect for their emotion, I did not approach their group. But I kept careful watch, and I perceived no one but the living. At the seance of November 10 the noise of a sonorous object notified us of a displacement, a movement. We seem to hear the violin strings lightly touched. It is, in fact, the little violin on the round table, which is lifted to a height somewhat above that of the head of the medium, passes into the opening between the two curtains, and appears before us with the neck forward. The idea comes into my head to grasp this instrument during its slow passage through the air; but I hesitate, because I wish to see what will become of it. It comes as far as the middle of the table, descends, then falls, partly upon the table, partly upon the left hand of M. Brisson and the right hand of Mme. Fourton. That was one of the most accurate observations that I made at this seance. I did not let go of Eusapia's right hand for a single instant, and M. Brisson did not for a moment let go of her left hand. But in the face of phenomena so incomprehensible we always revert to scepticism. In the seance of November 19 we had thoroughly resolved this time not to leave any loophole for doubt as to the hands, to hinder every attempt at substitution, and to have the most complete control of each hand, without having our attention withdrawn from this object for a single moment. Eusapia has only two hands. She belongs to the same zoological species that we do, and is neither trimanous nor quadrumanous.