The balance of that day we spent in continuing a minute and fruitless exploration of the monotonous coast. There was not another break in the frowning cliffs--not even another minute patch of pebbly beach. As the sun fell, so did our spirits. I had tried to make advances to the girl again; but she would have none of me, and so I was not only thirsty but otherwise sad and downhearted. I was glad when the new day broke the hideous spell of a sleepless night.

The morning's search brought us no shred of hope. Cap.r.o.na was impregnable--that was the decision of all; yet we kept on. It must have been about two bells of the afternoon watch that Bradley called my attention to the branch of a tree, with leaves upon it, floating on the sea. "It may have been carried down to the ocean by a river," he suggested.

"Yes," I replied, "it may have; it may have tumbled or been thrown off the top of one of these cliffs."

Bradley's face fell. "I thought of that, too," he replied, "but I wanted to believe the other."

"Right you are!" I cried. "We must believe the other until we prove it false. We can't afford to give up heart now, when we need heart most.

The branch was carried down by a river, and we are going to find that river." I smote my open palm with a clenched fist, to emphasize a determination unsupported by hope. "There!" I cried suddenly. "See that, Bradley?" And I pointed at a spot closer to sh.o.r.e. "See that, man!" Some flowers and gra.s.ses and another leafy branch floated toward us. We both scanned the water and the coastline. Bradley evidently discovered something, or at least thought that he had. He called down for a bucket and a rope, and when they were pa.s.sed up to him, he lowered the former into the sea and drew it in filled with water. Of this he took a taste, and straightening up, looked into my eyes with an expression of elation--as much as to say "I told you so!"

"This water is warm," he announced, "and fresh!"

I grabbed the bucket and tasted its contents. The water was very warm, and it was fresh, but there was a most unpleasant taste to it.

"Did you ever taste water from a stagnant pool full of tadpoles?"

Bradley asked.

"That's it," I exclaimed, "--that's just the taste exactly, though I haven't experienced it since boyhood; but how can water from a flowing stream, taste thus, and what the d.i.c.kens makes it so warm? It must be at least 70 or 80 Fahrenheit, possibly higher."

"Yes," agreed Bradley, "I should say higher; but where does it come from?"

"That is easily discovered now that we have found it," I answered. "It can't come from the ocean; so it must come from the land. All that we have to do is follow it, and sooner or later we shall come upon its source."

We were already rather close in; but I ordered the U-33's prow turned insh.o.r.e and we crept slowly along, constantly dipping up the water and tasting it to a.s.sure ourselves that we didn't get outside the fresh-water current. There was a very light off-sh.o.r.e wind and scarcely any breakers, so that the approach to the sh.o.r.e was continued without finding bottom; yet though we were already quite close, we saw no indication of any indention in the coast from which even a tiny brooklet might issue, and certainly no mouth of a large river such as this must necessarily be to freshen the ocean even two hundred yards from sh.o.r.e. The tide was running out, and this, together with the strong flow of the freshwater current, would have prevented our going against the cliffs even had we not been under power; as it was we had to buck the combined forces in order to hold our position at all. We came up to within twenty-five feet of the sheer wall, which loomed high above us. There was no break in its forbidding face. As we watched the face of the waters and searched the cliff's high face, Olson suggested that the fresh water might come from a submarine geyser. This, he said, would account for its heat; but even as he spoke a bush, covered thickly with leaves and flowers, bubbled to the surface and floated off astern.

"Flowering shrubs don't thrive in the subterranean caverns from which geysers spring," suggested Bradley.

Olson shook his head. "It beats me," he said.

"I've got it!" I exclaimed suddenly. "Look there!" And I pointed at the base of the cliff ahead of us, which the receding tide was gradually exposing to our view. They all looked, and all saw what I had seen--the top of a dark opening in the rock, through which water was pouring out into the sea. "It's the subterranean channel of an inland river," I cried. "It flows through a land covered with vegetation--and therefore a land upon which the sun shines. No subterranean caverns produce any order of plant life even remotely resembling what we have seen disgorged by this river. Beyond those cliffs lie fertile lands and fresh water--perhaps, game!"

"Yis, sir," said Olson, "behoind the cliffs! Ye spoke a true word, sir--behoind!"

Bradley laughed--a rather sorry laugh, though. "You might as well call our attention to the fact, sir," he said, "that science has indicated that there is fresh water and vegetation on Mars."

"Not at all," I rejoined. "A U-boat isn't constructed to navigate s.p.a.ce, but it is designed to travel below the surface of the water."

"You'd be after sailin' into that blank pocket?" asked Olson.

"I would, Olson," I replied. "We haven't one chance for life in a hundred thousand if we don't find food and water upon Cap.r.o.na. This water coming out of the cliff is not salt; but neither is it fit to drink, though each of us has drunk. It is fair to a.s.sume that inland the river is fed by pure streams, that there are fruits and herbs and game. Shall we lie out here and die of thirst and starvation with a land of plenty possibly only a few hundred yards away? We have the means for navigating a subterranean river. Are we too cowardly to utilize this means?"

"Be afther goin' to it," said Olson.

"I'm willing to see it through," agreed Bradley.

"Then under the bottom, wi' the best o' luck an' give 'em h.e.l.l!" 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 sc.r.a.ped 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 n.o.bs 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 gra.s.s 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 Jura.s.sic. 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 t.i.tanic 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 succ.u.mbing 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.

Shrieking and screaming, the German was dragged from the deck, and the moment the reptile was clear of the boat, it dived beneath the surface of the water with its terrified prey. I think we were all more or less shaken by the frightfulness of the tragedy--until Olson remarked that the balance of power now rested where it belonged. Following the death of Benson we had been nine and nine--nine Germans and nine "Allies," as we called ourselves, now there were but eight Germans. We never counted the girl on either side, I suppose because she was a girl, though we knew well enough now that she was ours.

And so Olson's remark helped to clear the atmosphere for the Allies at least, and then our attention was once more directed toward the river, for around us there had sprung up a perfect bedlam of screams and hisses and a seething caldron of hideous reptiles, devoid of fear and filled only with hunger and with rage. They clambered, squirmed and wriggled to the deck, forcing us steadily backward, though we emptied our pistols into them. There were all sorts and conditions of horrible things--huge, hideous, grotesque, monstrous--a veritable Mesozoic nightmare. I saw that the girl was gotten below as quickly as possible, and she took n.o.bs with her--poor n.o.bs had nearly barked his head off; and I think, too, that for the first time since his littlest puppyhood he had known fear; nor can I blame him. After the girl I sent Bradley and most of the Allies and then the Germans who were on deck--von Schoenvorts being still in irons below.

The creatures were approaching perilously close before I dropped through the hatchway and slammed down the cover. Then I went into the tower and ordered full speed ahead, hoping to distance the fearsome things; but it was useless. Not only could any of them easily outdistance the U-33, but the further upstream we progressed the greater the number of our besiegers, until fearful of navigating a strange river at high speed, I gave orders to reduce and moved slowly and majestically through the plunging, hissing ma.s.s. I was mighty glad that our entrance into the interior of Cap.r.o.na had been inside a submarine rather than in any other form of vessel. I could readily understand how it might have been that Cap.r.o.na had been invaded in the past by venturesome navigators without word of it ever reaching the outside world, for I can a.s.sure you that only by submarine could man pa.s.s up that great sluggish river, alive.

We proceeded up the river for some forty miles before darkness overtook us. I was afraid to submerge and lie on the bottom overnight for fear that the mud might be deep enough to hold us, and as we could not hold with the anchor, I ran in close to sh.o.r.e, and in a brief interim of attack from the reptiles we made fast to a large tree. We also dipped up some of the river water and found it, though quite warm, a little sweeter than before. We had food enough, and with the water we were all quite refreshed; but we missed fresh meat. It had been weeks, now, since we had tasted it, and the sight of the reptiles gave me an idea--that a steak or two from one of them might not be bad eating. So I went on deck with a rifle, twenty of which were aboard the U-33. At sight of me a huge thing charged and climbed to the deck. I retreated to the top of the conning-tower, and when it had raised its mighty bulk to the level of the little deck on which I stood, I let it have a bullet right between the eyes.

The thing stopped then and looked at me a moment as much as to say: "Why this thing has a stinger! I must be careful." And then it reached out its long neck and opened its mighty jaws and grabbed for me; but I wasn't there. I had tumbled backward into the tower, and I mighty near killed myself doing it. When I glanced up, that little head on the end of its long neck was coming straight down on top of me, and once more I tumbled into greater safety, sprawling upon the floor of the centrale.

Olson was looking up, and seeing what was poking about in the tower, ran for an ax; nor did he hesitate a moment when he returned with one, but sprang up the ladder and commenced chopping away at that hideous face. The thing didn't have sufficient brainpan to entertain more than a single idea at once. Though chopped and hacked, and with a bullethole between its eyes, it still persisted madly in its attempt to get inside the tower and devour Olson, though its body was many times the diameter of the hatch; nor did it cease its efforts until after Olson had succeeded in decapitating it. Then the two men went on deck through the main hatch, and while one kept watch, the other cut a hind quarter off Plesiosaurus Olsoni, as Bradley dubbed the thing. Meantime Olson cut off the long neck, saying that it would make fine soup. By the time we had cleared away the blood and refuse in the tower, the cook had juicy steaks and a steaming broth upon the electric stove, and the aroma arising from P. Olsoni filled us all with a hitherto unfelt admiration for him and all his kind.

Chapter 5

The steaks we had that night, and they were fine; and the following morning we tasted the broth. It seemed odd to be eating a creature that should, by all the laws of paleontology, have been extinct for several million years. It gave one a feeling of newness that was almost embarra.s.sing, although it didn't seem to embarra.s.s our appet.i.tes. Olson ate until I thought he would burst.

The girl ate with us that night at the little officers' mess just back of the torpedo compartment. The narrow table was unfolded; the four stools were set out; and for the first time in days we sat down to eat, and for the first time in weeks we had something to eat other than the monotony of the short rations of an impoverished U-boat. n.o.bs sat between the girl and me and was fed with morsels of the Plesiosaurus steak, at the risk of forever contaminating his manners. He looked at me sheepishly all the time, for he knew that no well-bred dog should eat at table; but the poor fellow was so wasted from improper food that I couldn't enjoy my own meal had he been denied an immediate share in it; and anyway Lys wanted to feed him. So there you are.

Lys was coldly polite to me and sweetly gracious to Bradley and Olson.

She wasn't of the gushing type, I knew; so I didn't expect much from her and was duly grateful for the few morsels of attention she threw upon the floor to me. We had a pleasant meal, with only one unfortunate occurrence--when Olson suggested that possibly the creature we were eating was the same one that ate the German. It was some time before we could persuade the girl to continue her meal, but at last Bradley prevailed upon her, pointing out that we had come upstream nearly forty miles since the boche had been seized, and that during that time we had seen literally thousands of these denizens of the river, indicating that the chances were very remote that this was the same Plesiosaur. "And anyway," he concluded, "it was only a scheme of Mr. Olson's to get all the steaks for himself."

We discussed the future and ventured opinions as to what lay before us; but we could only theorize at best, for none of us knew. If the whole land was infested by these and similar horrid monsters, life would be impossible upon it, and we decided that we would only search long enough to find and take aboard fresh water and such meat and fruits as might be safely procurable and then retrace our way beneath the cliffs to the open sea.

And so at last we turned into our narrow bunks, hopeful, happy and at peace with ourselves, our lives and our G.o.d, to awaken the following morning refreshed and still optimistic. We had an easy time getting away--as we learned later, because the saurians do not commence to feed until late in the morning. From noon to midnight their curve of activity is at its height, while from dawn to about nine o'clock it is lowest. As a matter of fact, we didn't see one of them all the time we were getting under way, though I had the cannon raised to the deck and manned against an a.s.sault. I hoped, but I was none too sure, that sh.e.l.ls might discourage them. The trees were full of monkeys of all sizes and shades, and once we thought we saw a manlike creature watching us from the depth of the forest.

Shortly after we resumed our course upstream, we saw the mouth of another and smaller river emptying into the main channel from the south--that is, upon our right; and almost immediately after we came upon a large island five or six miles in length; and at fifty miles there was a still larger river than the last coming in from the northwest, the course of the main stream having now changed to northeast by southwest. The water was quite free from reptiles, and the vegetation upon the banks of the river had altered to more open and parklike forest, with eucalyptus and acacia mingled with a scattering of tree ferns, as though two distinct periods of geologic time had overlapped and merged. The gra.s.s, too, was less flowering, though there were still gorgeous patches mottling the greensward; and lastly, the fauna was less mult.i.tudinous.