The skylights appeared to be the best exit from the room, and under one of them there was a convenient beam. The other skylight proved to be out of reach of anything. Since the building was of wood, I had to exercise great caution in moving about, so creaky were the boards. At 11 o'clock I climbed up to the beam and then crawled along it till I was exactly under my skylight. Then getting my shoulders well under it I heaved. Horror of horrors; it gave an awful crack and would not budge a hair's-breadth. This was a nuisance, only I called it something stronger than that! I got down, afraid that the loud crack must have alarmed the sentries, two of whose beats joined exactly opposite this tin room. However I was able to thank my good luck again as they had heard nothing. I had now to find another way out. I tried unpicking the lock with a bent nail, but had no success. I then tried to take the screws out of the lock with a table knife. One came loose but the others refused to shift at all. Foiled here I tried the wooden partition between the tin room and the passage beyond; but again I could make no progress, as the carpenters had done their work too well. I sat down on my box and sweated. The atmosphere of this closed room was simply appalling and my clothes were wringing wet by reason of it. It looked now as if I should be found next morning in this office, and get five months' solitary confinement in the cells for trying to escape, and not even have a run for my money. There still remained one chance, the most dangerous and therefore left until desperation should drive me to it. The side windows of the tin-office, some three and a half feet from the floor, opened onto the sentry's beat, exactly opposite the point where the other sentry, whose beat ran at right angles to the office, joined in. In addition there was a large arc lamp within thirty feet of these windows. My idea now was to watch until both sentries should be walking down their beats away from me, and therefore naturally with their backs turned, and then open my window, jump out, and run for it. The windows were made in two halves hinging at the sides and opening outwards. I could always get the sentry opposite the window walking in the right direction as a beginning. I had then to open the right-half of the window three or four inches in order to see where the other sentry was, as he walked up and down parallel to the windows and close up against the building. Of course I was in mortal dread each time I opened my window to find out his position, of discovering myself looking straight into his face. I never got such a bad shock as that, but neither did I ever get the two of them walking with their backs turned at the same time.