I watched for perhaps half an hour without motion while the long tongues gradually quietened, and then thinking that the time would soon come when I could make a rush to pass them, I made a careless movement, which stirred them to fresh activity, and the weary waiting had to be commenced again. At last, when most of them had withdrawn, and the rest were quiescent, I made a sudden rush, and though more than one shot upward as I passed, I ran through them successfully. For some time I ran on at my utmost speed, and exhausted myself proportionately. For another mile, perhaps, I kept to a panting trot, and I began to see the pink heads thrust up as I passed them. I looked back and saw them already high in the air a few yards behind. The sight gave me a fresh spurt, but it could not last. I could see no end to the tunnel. In fact I could see a very moderate distance only, owing to the steam in the atmosphere, and the narrow slit through which the light must enter. I had no means of estimating its length. It might be five miles. It might be fifty. Soon my pace slackened. Soon I was hacking with my knife again. Then there was the weary motionless waiting, till I could again go forward in safety. The next time my foot was caught I fell forward, and before I could rise, a dozen of them were round me. One held me by the right wrist, pulling till the hand was sunk in the sand, despite my frenzied efforts to free it. I was carrying the clasp-knife open in this hand, but I caught it up with my left and hacked through the sand, and at last cut the pulling worm that held me. I turned to others that were straining at my sides and legs, and one by one I cut them through. Then I noticed that my right wrist was streaming with blood, and thought at first that the knife had slashed it, till I saw that a broad line across the back was mottled with punctured wounds, where the worm had sucked it. I sat there for a long time, with neither strength nor courage to adventure farther. I thought of going back, but I felt that the distance would be beyond my strength to traverse.