Now came again the shape of something round swimming up against me, and as it struck my side, I beat at it savagely, though I smiled at my foolish fear the next moment, for it was one of the brandy-kegs washed out of the boat. But horror still seemed to hold me, as I waded on farther and farther, till once more the water began to deepen, and the ooze at the bottom grew softer; so I stopped, listening to the heavy rushing of water in front, where the drainage escaped, and washed heavily down, deepening the tunnel at the foot of the doors; while in that hollow, cavernous place, growing smaller moment by moment, the rushing sound was something hideous. Danger in front, for the great gates might at any time be opened; and danger behind, where the tide was coming in ceaselessly, and deepening the water around me with its regular beating throb, minute by minute. Thoughts of the past and present seemed to surge through my brain, so that I grew bewildered, and had any chance of escape presented itself I could not have seized it, though I could not but tell myself that escape was impossible. A few minutes--ten, twenty, thirty perhaps, and the black darkness seemed to be growing blacker. "I must be free," I muttered; and dragging Hodson's handkerchief from his neck, I bound it to my own, and then making them fast beneath his arms, felt among the woodwork till I could find a place where I could pass them through, so that I could secure him from slipping down, or being swept away by the ebbing and flowing of the water. I was not long in finding a place; but then the handkerchiefs were not long enough, and I had to add one from my pocket; then I left the poor fellow quite insensible and half-hanging from one of the timbers. And now I waded about, searching for the mouth of the air-pipe, in the hope of shouting up it for succour, since I felt convinced that the tide would effectually fill the tunnel, while the very thought of the gates being opened half-maddened me; and heedless now of who might hear me, so that they brought succour, I hunted aimlessly about, yelling and shrieking for aid.