... At all events the locks on these bars should offer no great difficulty to a competent mechanic. He set himself to a further examination of the tools in the lectern.
The main difficulty in the way of any plan of escape lay in his complete lack of both information and the means of obtaining it. The mechanical ape-men were hopeless; they merely babbled incoherent syllables and seemed incapable of fixing their attention on any object for as long as five minutes. As for the New York farmer his cage was so far away that the conversation could be carried on only in shouts, and every shout brought a warning flicker of the blue lights. On the second day, out of curiosity, Sherman kept up the conversation after the blue lights went on. A vivid stream of yellow light promptly issued from one corner of the cage, striking him fully in the eyes, and apparently it was accompanied by some kind of a force-ray for he found himself stretched flat on the floor. After that he did not repeat the experiment.
The next question was that of the lock on the cell-bars. The closest inspection he could give did not reveal the joints; they were extraordinarily well fitted. On the other hand, he remembered that the arm of the truck had reached under one of the lower bars. Lying flat on his back, Sherman pulled himself along from bar to bar, inspecting each in turn. About mid-way along the front of the cell, he perceived a tiny orifice in the base of one bar--a mere pin-hole. Marvelling at the delicacy of the adjustment which could use so tiny a hole as a lock he sat down to consider the question.
He was completely naked and had nothing but the objects that had been placed in his cell by his jailers. However--
Among the assortment of tools in his bureau was a curve-bladed knife with the handle set parallel to the blade as though it were meant for chopping, and forming the wall of the same drawer was a strip of a material like emery cloth. After some experimenting he found a finger-hole which, when squeezed, caused this emery-cloth to revolve, giving a satisfactory abrasive.
Thus armed with a tool and a means of keeping an edge on it, he took one of the metal bands from the drawer that contained the duplicate set of hands and set to work on it....