“As soon as the Countess was gone to bed, I introduced the generous stranger to my fellow servants. He soon convinced us that he was no stranger in the castle; for he knew every apartment, and every corner. ‘I was acquainted with the Prince of Ge**,’ he said, ‘the former possessor of the castle. He was extremely fond of physic, and chemistry, and his great skill in these sciences procured him publicly, the name of a man of great learning, and privately that of a sorcerer. His rank protected him against the fate which would have been the portion of every body else, if suspected of sorcery. He built the castle in this forest, in order to indulge here, without being interrupted by intruding visitors, his inclination for physical and chemical operations, by means of which he frightened many uninvited guests out of the castle. The most extraordinary tricks he played in the last room, on the first floor, which is connected by means of a machine, with a secret apartment on the ground floor. The latter having neither a door or windows, has very likely not yet been discovered by any of the inhabitants of the castle.’ This is really the case. The _Unknown_ demanded a candle, and requested us to follow him. He led us to a wall which we never had noticed. There he took a stone out of the floor, put his arm into the opening, and pushed a part of the wooden wall back. We followed him through the aperture of a small room, where we instantly beheld the machine of which we had been speaking. It consisted of a strong spring, which was connected with a large wooden cone, fitted in the ceiling, and fastened by a bolt. As soon as the bolt was pushed back, and somebody placed himself on the cone in the upper apartment, the spring was pressed down and the person sunk into the lower apartment, between four posts, in the joints of which the cone was sliding down. However as soon as one jumped from the cone, the spring made it snap back by the elastic force into its former place. In order to convince us of it, the _Unknown_ mounted up to the ceiling upon a ladder which was in the room, and suspended some heavy weights to hooks which were fastened to the under part of the cone, which made it slide down as soon as he removed the bolt, and was forced up again into its former place, by the elastic force of the spring, as soon as he had taken away the weights. This machine could not be perceived in the upper apartment, the floor of which consisted of cubical squares, resembling in form, colour and position, the moveable cone to which they seemed to be closely joined.