It happened I had been lecturing before a class of medical students in one of our colleges upon the relation of mind to body, and it occurred to me that this crib-tender might prove an illustration of my theory. His mind would have afforded it an opportunity to prey upon itself, and might become perverted. Under certain circumstances the mental exerts an influence over the physical system, aside from the voluntary volition of the will, and it frequently transpires that what is mere illusion in the spiritual nature appears a reality to the material, so closely are the two linked together. My interest being awakened, I secretly determined that I would try to discover who accepted this situation, and notice, if possible, what effect it would produce upon the keeper. Some time later I learned that the above advertisement had been answered the same day (the exact date I can not remember) by a German, one Gustav Stahlmann, who presented himself at the address indicated, and applied for the situation. After a slight examination he proved satisfactory in every respect. His recommendations were of the highest kind and bore testimony to his strict integrity and upright character. The position was accordingly offered to him, provided he would be willing to comply with certain conditions. First, that in accepting it he would bind himself to remain in the situation at least two years; and, secondly, that during that period, he would upon no occasion or pretense whatever, leave the crib. He manifested little hesitation in assenting to these requirements, as the salary was good, and an opportunity afforded for resting from the severe labor to which he had been accustomed. All necessary arrangements were completed, and upon the following day, with his dog for the sole companion of his future home, he had been taken out and instructed in the duties of his office. These were few and light, consisting mainly of attention to the water-gates of the tunnel, opening and closing them as required, and removing any obstructions which might clog their action. At night he was to trim and light the lamp which had been placed on the apex of the roof as a warning to passing vessels. This was all; the remainder of the time lay at his own disposal. A boy might readily have accomplished this labor, and he congratulated himself upon his good luck in securing so easy a berth—one, too, which yielded a good income. The first time I saw Stahlmann myself was soon after he had accepted the situation. If I recollect rightly, he told me he had been a month on the Crib. I had rowed myself out from the foot of Twelfth Street in a small boat.