I did not see anything quite like this in 1896; for, it will be remembered that the hand we saw at Choisy was slightly phosphorescent, and presented quite a different appearance to the dark, solid-looking arm and hand which I saw at l’Agnélas. I remember one day at Choisy, when M. de Gramont was in the cabinet behind Eusapia, the latter told us to blow hard. At the same moment, M. de Gramont saw the shape of a pair of bellows. At Bordeaux, in 1897, we again saw black, opaque forms under excellent conditions. A few extracts from the reports of these seances will be found in the Appendix. I refer my readers to this for the detail of the material conditions under which we operated. I will simply indicate here that the room, in which we held our seances, is lighted up by a very large bay-window. The persian shutters were closed for the seances; but the gas-light, from the kitchen premises, was reflected through the persians on to the window-panes, and cast a faint light in the seance-room. In consequence of this reflection on the panes, the window formed a kind of clear background, upon which the silhouettes of certain black forms could be seen by at least half of the experimenters. We all saw these forms, or rather the form; for it was always the same form which was shown, the profile of a long bearded face with a strongly arched nose. This appearance is said to be the head of ‘John,’ Eusapia’s habitual personification. It is an extraordinary phenomenon; and the first idea which presents itself to the mind is that of a collective hallucination. But then it remains to be asked, why it was manifested under the very special conditions I have indicated. Moreover, the care with which we observed this curious phenomenon, and—it seems to me superfluous to add—the calm with which we experimented, render the hypothesis of hallucination a most unlikely one.