I have said many times that I am not a man of quick understanding, neither was I ever clever at explaining puzzles. At that time, however, my brain seemed more than ordinarily active, and I saw things with a clearness that I had never seen before. Besides, I was sure that in the past I had been rendered partially incapable by the drugs which had been given me. Anyhow, the sudden shock seemed to have given me greater clearness of vision, so that I was able to comprehend things far more clearly than in the past. Hitherto, with the exception of occasional flashes of light, all had been dull, now I seemed to see the truth plainly. That which had come to me as vague conjectures now appeared as certainties, and in spite of the old man's dread news, I had more hope than in the past. I felt sure there were many things as yet unexplained. With my greater mental activity came also more physical vigour. I felt myself capable of trying to escape. I wondered at myself, Jasper Pennington, being kept so long a prisoner without making any attempt at escaping, and I determined that very day to take some definite steps to obtain my liberty. I therefore ate my dinner eagerly when it was brought, for I felt that I should need all my strength, but within half an hour from the time the meal was ended a feeling of torpor again crept over me, and I fell asleep, neither did I wake for several hours. After I awoke some two or three hours passed before my vision was again clear. I saw then that if I were to take any definite action, I must refrain from the food provided for me, and this also placed me in a dilemma, for if I ate no food how could I retain my strength? What was done must be done quickly. Not only had my medicine contained a powerful narcotic, but my food also was drugged. Consequently I did not partake of my night meal, but instead I feigned illness when it was brought, and afterward thought of many things which I hoped to do. Presently, by the great silence which prevailed, I concluded that the inhabitants of my prison house had gone to rest, so I got up and tried the door. It was built strongly, but I believed it could be wrenched open if I had something in the shape of a crowbar. I thought of every article in the room, but could fasten on nothing suitable for the purpose, when I remembered the iron bars which had been placed outside the window. I climbed to the little opening in the wall, and opened the window as far as I was able. The cold air came rushing in, giving strength to my resolution. I seized one of the bars, but it did not move. Then I put forth my strength, which had been slowly coming back to me, and in a few minutes had torn it from the wall.