When his antagonist had made his move, the automaton paused and appeared to study the game, before proceeding further. It nodded its head to indicate check to the king. If a false move was made by its opponent, it rapped on the table, and replaced the piece, claiming the move for itself. Maelzel, acting for the human player, repeated his move on the chess-board of the Turk, and when the latter moved, made the corresponding move on the board of the challenger. The whirring of machinery was heard during the progress of the game, but this was simply a blind. It subserved two purposes: _first_, to induce the spectators to believe that the automaton was really operated by ingenious mechanism, {110} _second_, to disguise the noise made by the concealed confederate as he shifted himself from one compartment to the other, as the various doors were opened and shut in succession. No machine could possibly be constructed to imitate the human mind when engaged in playing chess, or any other mental operation where the indeterminate enters and which requires knowledge and reflection. But the majority of people who saw the automaton did not realize this fact, and pronounced it a _pure machine_. Signor Blitz, the conjurer, who was intimate with Maelzel, having frequently given entertainments in conjunction with him, was possessed of the secret of the Turk. In his memoirs, he says: “The Chess Player was ingeniously constructed—a perfect counterpart of a magician’s trick-table with a variety of partitions and doors, which, while they removed every possible appearance of deception, only produced greater mystery, and provided more security to the invisible player. The drawers and closets were so arranged as to enable him to change his position according to circumstances: at one moment he would be in this compartment; the next in that; then in the body of the Turk.” He says this concealed assistant was named Schlumberger. This explanation is verified by Professor Allen,[20] who was very intimate with Maelzel. [20] Fiske’s _Book of the First American Chess Congress_, New York, 1859. Pp. 420–484. William Schlumberger was a native of Alsace, a remarkable chess expert and linguist. Maelzel picked him up in the Café de la Regence, Paris, where he eked out a meagre living as a teacher of chess. Occasionally, Schlumberger would over-indulge in wine, and as a result would be beaten, while acting as the motive power of the Turk. “On one occasion,” says Professor Allen, “just as Maelzel was bringing the Turk out from behind the curtain, a strange noise was heard to proceed from his interior organization, something between a rattle, a cough, and a sneeze. Maelzel pushed back his ally in evident alarm, but presently brought him forward again, and went on with the exhibition as if nothing had happened.” {111} Schlumberger not only acted as confederate, but served his employer as secretary and clerk.