However, it seemed to me madness to stay where we were, to be drowned like rats in a hole; and taking advantage of the next receding wave, I gave the boat a start, and she went down towards the mouth of the tunnel for a little way, when a coming current would have driven her back, only I clung to the root now very low down, and rather close to which the boat now floated. Another thrust, and I pushed her some distance down, but with the next wave that came in, my hand was jammed against the slimy roof, and, unnerved with horror, I gasped: "Rouse up, Harry! the mouth's under water!" Hollowly sounded my voice as the wave sank, and I felt once more free, and in sheer despair forced the boat lower down the tunnel; but this time, when the tide came in again, I had to lie right back, the boat rose so high, and I felt the dripping seaweed hanging from the roof weep coldly and slimily over my face; when, before the next wave could raise us, I thrust eagerly at the side, forcing the boat inward again, but in the fear and darkness, got her across the tunnel, so that head and stern were wedged, and as the next rush of water came, it smote the boat heavily, and made her a fixture, so that in spite of my efforts, it could not move her either way. Wash came the water again and again, and at every dash a portion came into the boat, drenching me to the skin; while I now became aware that Harry Hodson was lying stupefied across the kegs, and breathing heavily. I made one more effort to move the boat, but it was tighter than ever; and after conquering an insane desire to dive out, and try and swim to the mouth, I let myself cautiously down on the inner side, and stood, with the water breast-high, clinging to the gunwale. The next moment it rose above my mouth, lifting me from my feet, and as it rushed back, sucked my legs beneath the boat; but I gained my feet again, and began to wade inward. Yet strong upon me as was the desire for life, I could not leave my companion to his fate in so cowardly a way; so I turned back, and this time swimming, I reached the boat, now nearly full of water; and half dragging, half lifting, I got his body over the side, and holding on by his collar, tried once more for bottom. But it was a horrible time there in the dense black darkness--a darkness that, in my distempered brain, seemed to be peopled with hideous forms, swimming, crawling, and waiting to devour us, or fold us in their slimy coils. The dripping water sounded hollow and echoing; strange whispers and cries seemed floating around; the mussels rustled together: and ever louder and louder came the "lap, lap, lapping" of the water as it rushed in and dashed against the sides and ceiling of the horrible place.