Read it through once

The walls of these dungeons are as thick as some bed-chambers at home are wide--fifteen feet. We saw the damp, dismal cells in which two of Dumas' heroes passed their confinement--heroes of “Monte Cristo.” It was here that the brave Abbe wrote a book with his own blood, with a pen made of a piece of iron hoop, and by the light of a lamp made out of shreds of cloth soaked in grease obtained from his food; and then dug through the thick wall with some trifling instrument which he wrought himself out of a stray piece of iron or table cutlery and freed Dantes from his chains. It was a pity that so many weeks of dreary labor should have come to naught at last.