"Then under the bottom, wi' the best o' luck an' give 'em hell!" cried a young fellow who had been in the trenches.

"To the diving-stations!" I commanded, and in less than a minute the deck was deserted, the conning-tower covers had slammed to and the U-33 was submerging—possibly for the last time. I know that I had this feeling, and I think that most of the others did.

As we went down, I sat in the tower with the searchlight projecting its seemingly feeble rays ahead. We submerged very slowly and without headway more than sufficient to keep her nose in the right direction, and as we went down, I saw outlined ahead of us the black opening in the great cliff. It was an opening that would have admitted a half-dozen U-boats at one and the same time, roughly cylindrical in contour—and dark as the pit of perdition.

As I gave the command which sent the U-33 slowly ahead, I could not but feel a certain uncanny presentiment of evil. Where were we going? What lay at the end of this great sewer? Had we bidden farewell forever to the sunlight and life, or were there before us dangers even greater than those which we now faced? I tried to keep my mind from vain imagining by calling everything which I observed to the eager ears below. I was the eyes of the whole company, and I did my best not to fail them. We had advanced a hundred yards, perhaps, when our first danger confronted us. Just ahead was a sharp right-angle turn in the tunnel. I could see the river's flotsam hurtling against the rocky wall upon the left as it was driven on by the mighty current, and I feared for the safety of the U-33 in making so sharp a turn under such adverse conditions; but there was nothing for it but to try. I didn't warn my fellows of the danger—it could have but caused them useless apprehension, for if we were to be smashed against the rocky wall, no power on earth could avert the quick end that would come to us. I gave the command full speed ahead and went charging toward the menace. I was forced to approach the dangerous left-hand wall in order to make the turn, and I depended upon the power of the motors to carry us through the surging waters in safety. Well, we made it; but it was a narrow squeak. As we swung around, the full force of the current caught us and drove the stern against the rocks; there was a thud which sent a tremor through the whole craft, and then a moment of nasty grinding as the steel hull scraped the rock wall. I expected momentarily the inrush of waters that would seal our doom; but presently from below came the welcome word that all was well.

In another fifty yards there was a second turn, this time toward the left! but it was more of a gentle curve, and we took it without trouble. After that it was plain sailing, though as far as I could know, there might be most anything ahead of us, and my nerves strained to the snapping-point every instant. After the second turn the channel ran comparatively straight for between one hundred and fifty and two hundred yards. The waters grew suddenly lighter, and my spirits rose accordingly. I shouted down to those below that I saw daylight ahead, and a great shout of thanksgiving reverberated through the ship. A moment later we emerged into sunlit water, and immediately I raised the periscope and looked about me upon the strangest landscape I had ever seen.

We were in the middle of a broad and now sluggish river the banks of which were lined by giant, arboraceous ferns, raising their mighty fronds fifty, one hundred, two hundred feet into the quiet air. Close by us something rose to the surface of the river and dashed at the periscope. I had a vision of wide, distended jaws, and then all was blotted out. A shiver ran down into the tower as the thing closed upon the periscope. A moment later it was gone, and I could see again. Above the trees there soared into my vision a huge thing on batlike wings—a creature large as a large whale, but fashioned more after the order of a lizard. Then again something charged the periscope and blotted out the mirror. I will confess that I was almost gasping for breath as I gave the commands to emerge. Into what sort of strange land had fate guided us?

The instant the deck was awash, I opened the conning-tower hatch and stepped out. In another minute the deck-hatch lifted, and those who were not on duty below streamed up the ladder, Olson bringing Nobs under one arm. For several minutes no one spoke; I think they must each have been as overcome by awe as was I. All about us was a flora and fauna as strange and wonderful to us as might have been those upon a distant planet had we suddenly been miraculously transported through ether to an unknown world. Even the grass upon the nearer bank was unearthly—lush and high it grew, and each blade bore upon its tip a brilliant flower—violet or yellow or carmine or blue—making as gorgeous a sward as human imagination might conceive. But the life! It teemed. The tall, fernlike trees were alive with monkeys, snakes, and lizards. Huge insects hummed and buzzed hither and thither. Mighty forms could be seen moving upon the ground in the thick forest, while the bosom of the river wriggled with living things, and above flapped the wings of gigantic creatures such as we are taught have been extinct throughout countless ages.

"Look!" cried Olson. "Would you look at the giraffe comin' up out o' the bottom of the say?" We looked in the direction he pointed and saw a long, glossy neck surmounted by a small head rising above the surface of the river. Presently the back of the creature was exposed, brown and glossy as the water dripped from it. It turned its eyes upon us, opened its lizard-like mouth, emitted a shrill hiss and came for us. The thing must have been sixteen or eighteen feet in length and closely resembled pictures I had seen of restored plesiosaurs of the lower Jurassic. It charged us as savagely as a mad bull, and one would have thought it intended to destroy and devour the mighty U-boat, as I verily believe it did intend.

We were moving slowly up the river as the creature bore down upon us with distended jaws. The long neck was far outstretched, and the four flippers with which it swam were working with powerful strokes, carrying it forward at a rapid pace. When it reached the craft's side, the jaws closed upon one of the stanchions of the deck rail and tore it from its socket as though it had been a toothpick stuck in putty. At this exhibition of titanic strength I think we all simultaneously stepped backward, and Bradley drew his revolver and fired. The bullet struck the thing in the neck, just above its body; but instead of disabling it, merely increased its rage. Its hissing rose to a shrill scream as it raised half its body out of water onto the sloping sides of the hull of the U-33 and endeavored to scramble upon the deck to devour us. A dozen shots rang out as we who were armed drew our pistols and fired at the thing; but though struck several times, it showed no signs of succumbing and only floundered farther aboard the submarine.

I had noticed that the girl had come on deck and was standing not far behind me, and when I saw the danger to which we were all exposed, I turned and forced her toward the hatch. We had not spoken for some days, and we did not speak now; but she gave me a disdainful look, which was quite as eloquent as words, and broke loose from my grasp. I saw I could do nothing with her unless I exerted force, and so I turned with my back toward her that I might be in a position to shield her from the strange reptile should it really succeed in reaching the deck; and as I did so I saw the thing raise one flipper over the rail, dart its head forward and with the quickness of lightning seize upon one of the boches. I ran forward, discharging my pistol into the creature's body in an effort to force it to relinquish its prey; but I might as profitably have shot at the sun.