He claims to have trained the eye and memory of his son, by leading the latter past shop windows, and after allowing him one glance, demanding the names of articles seen at this single glance. When the boy could mention forty things after passing the window, his education was pronounced good. Robert-Houdin also tells in his “Memoirs” of spending hours with his son in poring over an enormous collection of coins, medals, etc., which severe lesson helped them both in future performances. To the conjurer, this tale is farcical. Not only was there no need of forcing the boy to become a coin expert, but the task was one which could not be accomplished in the brief time which Robert-Houdin allowed himself for perfecting the trick.
The only knowledge required about coins is to recognize a coin when you see it. Some one may hand a coin of peculiar stamp, and the operator must signal to his medium the metal and all he knows about it. Of course, if both know the various coins, then they can understand each other with less signaling than if the coins were unfamiliar to either.
Inaudi, the French calculator, can look at a blackboard filled with numbers for a few seconds, then turn his back upon them and add the entire amount that he has just seen and memorized. But let the reader understand that Inaudi is peculiarly gifted by nature, while second sight is a trick in which the person on the stage known as the medium is assisted by words, signs, prearranged movements, or articles or figures in rotation, which to the layman have the appearance of being unprepared. At a familiar cue, however, the operator touches articles that have been memorized, a ring, a watch, a scarf-pin, a lady’s fan, an opera glass, all in rotation. At a snap of the fingers the medium will know that the articles are to be named in consecutive order, and only after the snap of the fingers or another cue agreed upon.
Robert-Houdin presented the trick for the first time at his own theatre, February 12th, 1846. Unquestionably at this time he employed the speaking code, wherein the answer is contained in the question asked of the medium by the performer. As he describes scene after scene in which he and his son participated, it is almost possible for a conjurer or any one interested in magic to follow his code. Apparently the amusement-loving public became familiar with his speaking code, for three years later, according to the illustrated appendix of the French edition of his “Memoirs,” he adopted a code of signals, which he states was especially arranged to confuse those whom he terms his “fearless discoverers.”
A mysterious bell was used in this connection, but he admits that it mattered not whether the bell struck or was silent, his son could name the object under consideration or answer the question. While Robert-Houdin asserts that he did not employ electricity for working his silent code, investigations make it almost certain that this was the method used. It is known throughout the world of conjuring that in 1850-51 Robert Heller (William Henry Palmer) reproduced Robert-Houdin’s entire répertoire of tricks, with the exception of the suspension, and all worked precisely by Robert-Houdin’s methods. In the second-sight trick, which he first presented with a young man as the medium, then later with Miss Haidee Heller, the medium was seated on a sofa fully equipped with wires and electric batteries. Heller’s second sight was worked with both the speaking and silent codes. His confederate was concealed behind the scenes watching Heller through a peep-hole, or possibly he used another, seated in the audience, and had the wires strung under his chair, arranging the signal button so that it could be easily reached on the arm or front part of the seat. The receiving instrument was attached to the sofa on which the medium was seated. The latter would be silently informed as to what was being shown and would answer all questions. As proof that these statements are not mere hearsay, the Heller sofa can now be seen in the possession of Mr. Francis J. Martinka, of New York; and Dr. W. Golden Mortimer, who once presented “Mortimer’s Mysteries,” a show on the style of Heller’s performance, furnishes the information that when Heller died in Philadelphia, November 28th, 1878, he engaged the dead magician’s chief assistant, an expert electrician named E. J. Dale, who had acted as secret confederate, assisting the medium.