One of the most instructive incidents I know, in relation to this question of the psychology of deception, is the one given by Doctor Hodgson[1]--the case of the officer and the Hindu juggler. In this case, a trick was performed before an English officer and his wife, and Doctor Hodgson happened to overhear this officer telling some travelers of the experience at dinner that evening. "Referring to the movements of the coins, he said that he had taken a coin from his own pocket and placed it on the ground himself, yet that this coin had indulged in the same freaks as the other coins. His wife ventured to suggest that the juggler had taken the coin and placed it on the ground, but the officer was emphatic in repeating his statement, and appealed to me for confirmation. He was, however, mistaken. I had watched the transaction with special curiosity, as I knew what was necessary for the performance of the trick. The officer had apparently intended to place the coin upon the ground himself, but as he was doing so, the juggler leaned slightly forward, dexterously and in a most unobtrusive manner received the coin from the fingers of the officer, as the latter was stooping down, and laid it close to the others. If the juggler had not thus taken the coin, but had allowed the officer himself to place it on the ground, the trick, as actually performed, would have been frustrated. [1] Proceedings Society for Psychical Research, Vol. IV., pp. 385-6. "Now I think it highly improbable that the movement of the juggler entirely escaped the perception of the officer; highly improbable, that is to say, that the officer was absolutely unaware of the juggler's action at the moment of its happening; but I suppose that, although an impression was made on his consciousness, it was so slight as to be speedily effaced by the officer's IMAGINATION of himself as stooping and placing the coin upon the ground. The officer, I may say, had obtained no insight into the modus operandi of the trick, and his fundamental misrepresentation of the only patent occurrence that might have given him a clew to its performance debarred him completely from afterwards, on reflection, arriving at any explanation. Just similarly, many an honest witness may have described himself as having placed one slate upon another at a sitting with a medium, whereas it was the medium who did so, and who possibly effected at the same time one or two other operations altogether unnoticed by the witness."