With Eusapia, the sitters’ chairs were frequently displaced, shaken, raised, and even carried on to the table. I cannot conceive how Eusapia could have obtained such results normally, considering the strict test conditions exacted at l’Agnélas. We had been courteously acquainted with the results of the Cambridge seances, and our attention had been very specially drawn to the fraudulent practices of this medium. One of us held her feet and her waist, while the mission of two others, seated on either side of her, was to observe her hands. It is relatively easy to know if we hold a right or left hand: it suffices to carefully note the position of the thumb, which ought always to be turned towards the observer if the hand be directed palm upwards, and which ought to be turned towards the medium if the hand be directed palm downwards. It is unnecessary to hold the medium’s hand tightly in order to be aware of its position: an ordinary contact, intelligently superintended, is quite enough; it is of course necessary to make sure of the simultaneous contact of thumb and fingers. Now, in a certain number of cases, the check upon the medium was good, when the chair of one of the sitters was carried on to the table. It is also to be noted, that Eusapia would have been forced to lean forward in a very marked manner, in order to seize her neighbour’s chair and carry it on to the table; the inclination of her body would have been easily perceived, especially as the chair was first of all drawn away from under the experimenter and then raised on to the table, manœuvres which occupied some time. Other phenomena of the same kind were, however, produced in a more conclusive manner. I remember having seen the lid of a trunk, which was placed behind the experimenters and to the left of Eusapia, open and shut of its own accord.