"There are bars to the windows," the captain said, "and a sentry is always on duty outside. The only way would be to escape at the rear. I have often thought it over, but it was of no use breaking out there, if I could not get any farther. The wall is built of loose stone, without mortar. You see, it would have been a big job to bring up either mortar or bricks from down below, so most of the buildings are entirely of stone. The wall is two feet thick, but there would be no great difficulty in getting out the stones, and making a hole big enough to crawl through. I could not do it in my room, because they always look round to see that everything is safe before they lock me up; and it would take so long to do it noiselessly that half the night would be wasted, before I could get out. But the magazine, where the spears are kept, communicates with my room, and I could slip in there in the daytime, when no one was looking, get behind the spears, which are piled against the wall, and work hidden by them. No one would be likely to go into my room during the day, and if he did, he would not expect to find me there, as I am generally about the place. In that way, I could get out enough stones to render it an easy job to finish it, after I was locked up. A spear head is as good a thing, to help me prize them out, as one could wish for." "Very well, Father. Then we had better settle that you shall get out in that way. Now, shall we go round on the outside, and help you?" "No; I don't say but that your help would make it easier to get the stones out, without making a noise. Still, your going round might be noticed." "Well then, Father, shall we seize and gag the sentry? We have done such a thing before, successfully." "No, that wouldn't do, Dick. The guard house is hard by, and the slightest noise would destroy us all. Besides, as they have not many sentries posted up here, they relieve guard every hour, so that the thing would be discovered in no time. "No; when I get out I will creep along noiselessly by the wall. There are houses in the yard almost all along, and though the sentry would not be likely to see me, in the shade of the wall, I will take care to cross the open spaces when his back is turned. I will then come straight here for you, and we will make for the wall behind the governor's house. There is no sentry on that side, for that steep ravine covers it from attack there. However, there are six or eight feet of level ground between the foot of the wall and the edge of the ravine. The walls are twenty feet in height. With fifty feet of that rope I will make a ladder, and will get hold of a piece of iron to make a grapnel of. How much time can you give me?" "I should think we could stay here today and tomorrow, without seeming to be dawdling without reason. Do you think you could get ready by tomorrow night, Father?"