The outlines of the last appearance I described were well defined, and in its upper part reminded one of the folds of material. Some of my co-experimenters thought they recognised a masculine, bearded head therein, covered with a turban or burnoose. If we had been in the presence of an artificial phenomenon, the luminous object should have presented the same aspect to every observer. It was not so in reality; for some of us could distinguish no recognisable form in the luminosity. I know that the imagination can be the cause of much visual illusion. It makes us complete imperfect images, and see faces and forms in plays of light and shade which only faintly recall these forms and faces. I have not observed the curious phenomena which I describe, under conditions sufficiently precise to enable me to affirm their objectivity, and I can only repeat what I said just now, that their reality appeared probable to me, in spite of the frauds of which I knew, and those which I suspected; in spite of my intellect’s prejudice, I was favourably impressed. I will add that the luminosity, which floated about the room, moved about up and down, and lasted for several seconds. That part of the room where it floated about was blocked up with the table, chairs and other furniture, which had been taken there from the recess adjoining the seance-room. All the experimenters were grouped together in one part of the room. None of them left their seats during the production of these phenomena. Had the medium left the cabinet and manœuvred the light we perceived, he would have knocked against the scattered furniture. We kept the strictest silence, when luminous phenomena were being produced, and we would certainly have heard the medium moving about, had he left the cabinet. Now, we heard no noise whatsoever; neither of the footsteps he would have been obliged to make, nor of the furniture which he would have knocked against, unless he be able to see remarkably well in the dark. Such are the observations I have to present upon this curious seance. One of my friends, an eminent savant, well acquainted with this kind of phenomena, had, like myself, the impression that those I have depicted were real. Moreover, in other seances this medium gave us similar luminosities. I will even point out that one of the suspected sitters—the medical student—the clever chemist—having been eliminated, and the experiments taking place at the house of one of my medical friends, we observed globular lights on the curtains of the cabinet behind which the medium was sitting. These lights were much smaller than those I have just described—they were as large as a walnut—but were easily observable.