Yorke again strolled down to the palisade and stood looking through it thoughtfully for some time. The fences outside were certainly as awkward obstacles as could be imagined. The posts were six feet high; the wires were about eight inches apart, and the barbs a little more than six inches. On each wire were hung three tin cans between each post. There were three lines of fencing. The lowest wire was four inches above the ground, differing from the others only in having no tins attached to it, there not being depth enough for them to hang. Suddenly the puzzled look on Yorke's face was succeeded by one of satisfaction. "It is as good as done!" he exclaimed. "With a strong pair of nippers the bottom wire can be cut, and that will leave a sufficient space to crawl under. There will be about a foot clear between the ground and the next wire. After deducting an inch for the barb, there are still eleven inches, and lying perfectly flat one ought to be able to crawl under that, taking care to avoid the tins." That day and the two days following Yorke did not go near Hans. One of the other guards might notice the latter talking two or three days in succession to the same prisoner. On the third day he again placed himself in his way and handed him a note. _Get a strong pair of wire-nippers. Let the rope be about eighteen feet long. There is nothing else I shall want to enable us to get away. If you can get another rifle and ammunition, and hide them some little distance from the prison, all the better. I shall save some food--enough, I hope, to last for two or three days. You had better bring some in your pocket too. There will be no moon on Monday next, and if you are on guard that night near my door we had better try then. At eleven o'clock I shall be listening for the sound of your file. If I do not hear it by half-past eleven I shall suppose that you are posted somewhere else, but I shall listen three or four nights before, and every night after that, at the same hour. I shall not write again. It is better that we should not be noticed speaking to each other, so pay no attention to me unless you have something particular to say._ As he gave the paper to Hans, the latter slipped into his hand a small tin oil-can, one of those used for oiling sewing-machines and bicycles, and also a paper of tobacco. "If I am asked why I was speaking to you," Hans muttered, "I can say you asked me to buy you a quarter of a pound of tobacco." It was well the precaution had been taken, for a minute later one of the other guards came up and asked roughly, "What did that man give you?" Yorke assumed a look of surprise, put his hand in his pocket, and took out the little parcel. "There it is," he said. "It is a quarter of a pound of tobacco. I asked him to get the best he could buy. I hope that he has done so, but I have not tried it." He opened it carelessly, and the guard glanced at it, and then went away satisfied with the explanation.