The inner wall which I had to scale was built of bricks, 12ft. high, with a row of iron spikes, 3in. apart upon the top. The outer I had only caught a glimpse of once or twice, when the gate of the exercise yard was open. It appeared to be about the same height, and was also spiked at the top. The space between the walls was over twenty feet, and I had reason to believe that there were no sentries there, except at the gates. On the other hand, I knew that there was a line of soldiers outside. Behold the little nut, my friends, which I had to open with no crackers, save these two hands.
One thing upon which I relied was the height of my comrade Beaumont. I have already said that he was a very tall man, six feet at least, and it seemed to me that if I could mount upon his shoulders, and get
