One fine morning, as I was walking in the garret, my eyes fell on the iron bar I have mentioned, and I saw that it might very easily be made into a defensive or offensive weapon. I took possession of it, and having hidden it under my dressing-gown I conveyed it into my cell. As soon as I was alone, I took the piece of black marble, and I found that I had to my hand an excellent whetstone; for by rubbing the bar with the stone I obtained a very good edge. My interest roused in this work in which I was but an apprentice, and in the fashion in which I seemed likely to become possessed of an instrument totally prohibited under the Leads, impelled, perhaps, also by my vanity to make a weapon without any of the necessary tools, and incited by my very difficulties (for I worked away till dark without anything to hold my whetstone except my left hand, and without a drop of oil to soften the iron), I made up my mind to persevere in my difficult task. My saliva served me in the stead of oil, and I toiled eight days to produce eight edges terminating in a sharp point, the edges being an inch and a half in length. My bar thus sharpened formed an eight-sided dagger, and would have done justice to a first-rate cutler. No one can imagine the toil and trouble I had to bear, nor the patience required to finish this difficult task without any other tools than a loose piece of stone. I put myself, in fact, to a kind of torture unknown to the tyrants of all ages. My right arm had become so stiff that I could hardly move it; the palm of my hand was covered with a large scar, the result of the numerous blisters caused by the hardness and the length of the work. No one would guess the sufferings I underwent to bring my work to completion. Proud of what I had done, without thinking what use I could make of my weapon, my first care was to hide it in such a manner as would defy a minute search. After thinking over a thousand plans, to all of which there was some objection, I cast my eyes on my arm-chair, and there I contrived to hide it so as to be secure from all suspicion. Thus did Providence aid me to contrive a wonderful and almost inconceivable plan of escape. I confess to a feeling of vanity, not because I eventually succeeded--for I owed something to good luck--but because I was brave enough to undertake such a scheme in spite of the difficulties which might have ruined my plans and prevented my ever attaining liberty. After thinking for three or four days as to what I should do with the bar I had made into an edged tool, as thick as a walking-stick and twenty inches long, I determined that the best plan would be to make a hole in the floor under my bed.