The state of mind of the by-standers, sympathetic or antipathetic, has an influence upon the production of the phenomena. This is an incontestable matter of observation. I am not speaking here merely of a tricky medium rendered powerless to act by a too close critical inspection, but also of a hostile force which may more or less neutralize the sincerest volition. Is it not the same, moreover, in assemblies, large or small, in conferences, in salons, etc.? Do we not often see persons of baleful and antipathetic spirit defeat at their very beginning the accomplishment of the noblest purposes. Here are the results of another sitting of the same medium held a few days afterwards. On the 7th of June, 1906, I had been informed by my friend Dr. Ostwalt, the skilled oculist, who was at that time treating Eusapia, that she was to be at his house that evening and that perhaps I would be able to try a new experiment. I accepted with all the more readiness because the mother-in-law of the doctor, Mme. Werner, to whom I had been attached by a friendship of more than thirty years, had been dead a year, and had many a time promised me, in the most formal manner, to appear after her death for the purpose of giving completeness to my psychical researches by a manifestation, if the thing was possible. We had so often conversed on these subjects, and she was so deeply interested in them, that she had renewed her promise very emphatically a few days before her death. And at the same time she made a similar promise to her daughter and to her son-in-law. Eusapia, also, on her part, grateful for the care she had received at the doctor's hands and for the curing of her eye, wished to be agreeable to him in any way she could. The conditions, then, were in all respects excellent. I agreed with the doctor that we had before us four possible hypotheses, and that we should seek to fix on the most probable one. _a._ What would take place might be due to fraud, conscious or unconscious. _b._ The phenomena might be produced by a physical force emanating from the medium. _c._ Or by one or several invisible entities making use of this force. _d._ Or by Mme. Werner herself. We had on that evening some movements of the table and a complete lifting of the four feet to a height of about eight inches. Six of us sat around the table,--Eusapia, Madame and Monsieur Ostwalt, their son Pierre, sixteen years old, my wife and myself. Our hands placed above the table scarcely touched it, and were almost wholly detached at the moment it rose from the floor. No fraud possible. Full light. The seance then continued in the dark. The two portieres of a great double-folding door, against which the medium was seated, her back to the door, were blown about for nearly an hour, sometimes so violently as to form something like a monk's hood on the head of the doctor and that of his wife. This great door was several times shaken violently, and tremendous blows were struck upon it.