I have not been able to make this verification, the sitting at which Dr. Le Bon was present having been the last which Eusapia had consented to give at my house. But his objection is of no value. I am absolutely certain that nobody glided behind the curtain, neither in this particular case nor in any other. My wife, also, particularly occupied herself in observing what took place in that part of the room and never was able to discover anything suspicious. There is only one hypothesis; that is, that Eusapia herself handled the objects. Since Dr. Le Bon declares that the thing was impossible, he himself personally inspecting it, we are compelled to admit the existence of an unknown psychic force.[27] Report of M. Armelin (_Seance of November 21_) (For this sitting I had asked three members of the Astronomical Society of France to exercise the severest control possible; namely, M. Antoniadi, my assistant astronomer at the observatory of Juvisy, M. Mathieu, agricultural engineer at the same observatory, and M. Armelin, secretary of the Astronomical Society. The last-named gentleman sent me the following report. There were also present M. and Mme. Brisson, M. Baschet, M. Jules Bois, Mme. Fourton, Mme. La Comtesse de Labadye.) At quarter of ten Eusapia takes her seat, her back to the place where the two curtains meet, her hands resting upon the table. At the invitation of M. Flammarion, M. Mathieu takes his seat at her right, charged with the duty of keeping constant watch upon her left hand, and M. Antoniadi is enjoined to do the same for her right hand. They also make themselves sure of her feet. At the right of M. Mathieu sits Mme. la Comtesse de Labadye; on the left of M. Antoniadi, Mme. Fourton. Facing Eusapia, between Mmes. de Labadye and Fourton, MM. Flammarion, Brisson, Baschet, and Jules Bois. The gas chandelier is lighted and the full light turned on. This chandelier is almost over the table. A little lamp with a shade is placed on the floor behind an easy-chair, near the opposite side of the room, in the direction of its greatest length, and to the left of the fireplace. At five minutes of ten the table is lifted from the side opposite to the medium and falls back with a bang.