We had now at command (if we could secretly purloin it) a rope to let us down, and a raft to ferry us over the moat, but we had still to find a means of getting beyond the wall, and to this I bent all my energy of mind. In this, too, I took Joe Punchard into consultation, and we discussed all kinds of plans. With the sentry on guard throughout the night in the courtyard there was no hope of escape by the gate and drawbridge. There was no opening in the wall. The only possible means of exit was to cut a hole in it, and this would be a matter of great toil, the wall being, as some one had told us, ten feet thick. It consisted, so far as we could tell from the inside, of solid blocks of stone cemented together, and when, at an odd moment when no one was looking, I tried to scrape away some of the cement between two of the stones, I found that it was almost as hard as the stone itself. To cut through ten feet of such solid material was a task that might have caused any one to despair. Still, it was the only course open to us, and I have never known any task too hard for patience and determination. Joe and I decided that we must gradually scrape away the cement around one of the blocks until we could remove this altogether, and then work at the next one, and the next, until we had pierced right through to the open air. Apart from the toilsomeness of the task, there were risks to be feared and provided against. First; one or another of the soldiers inspected our dormitory every day. This inspection, 'tis true, had become somewhat perfunctory, the man being content, as a rule, to mount the ladder until his head was a foot or two above the level of the floor, throw a hasty glance around, and descend again. The second risk was more serious. Since we could hear at night the tramp of the sentry going his round of the battlements, it was probable that, however quietly we might work, the sentry would hear the sound of scraping as he passed above. If the wall had been wainscotted, he might suppose such sounds to be caused by the gnawing of mice; but there was no likelihood of mice making their habitat in a thick stone wall. Further, even if we should so contrive that our task of scraping was interrupted when the sentry passed, there was still the danger that the sound might attract the attention of the men in the adjoining dormitory. If they should get any suspicion of what was toward, it would soon be common talk among the whole body of prisoners, and some whisper of it would certainly reach the ears of the guard. In order to lessen this risk, Joe and I decided to begin our work at a stone measuring three feet by two, in the right-hand corner of the dormitory, farthest removed from the partition dividing us from the next, and a foot or two above the floor, so that a bed could be pushed against the wall and hide all signs of our operations in case a sudden visit of inspection was made.