Read it through once

And then, when I had made an opening sufficient for my head, I put in the lantern, all closed, closed so that no light shone out, and then I thrust in my head. I moved it slowly — very, very slowly, so that I might not disturb the old man's sleep. It was the beating of the old man's heart. It increased my fury, as the beating of a drum stimulates the soldier into courage. But even yet I refrained and kept still. I scarcely breathed. I held the lantern motionless. I tried how steadily I could maintain the ray upon the eye.