Mercer conveyed the order instantly to Bonnett at the controls, and all three of our guides dived gracefully off the ship and disappeared into the depths below.

"Let her settle to the bottom, Bonnett," ordered Mercer. "Slowly ...

slowly...."

Bonnett handled the ship neatly, keeping her nicely trimmed. We came to rest on the bottom in four or five seconds, and as Mercer and I stared out eagerly through the round gla.s.s ports of the conning tower, we could see, very dimly, a cl.u.s.ter of dark, rounded projections cropping out from the bed of the ocean. We were only a few yards from the edge of the girl's village.

The scene was exactly as we had pictured it, save that it was not nearly as clear and well lighted. I realized that our eyes were not accustomed to the gloom, as were those of the girl and her people, but I could distinguish the vague outlines of the houses, and the slowly swaying shapes of monstrous growths.

"Well, Taylor," said Mercer, his voice shaking with excitement, "here we are! And here"--peering out through the gla.s.s-covered port again--"are her people!"

The whole village was swarming around us. White bodies hovered around us as moths around a light. Faces pressed against the ports and stared in at us with great, amazed eyes.

Then, suddenly the crowd of curious creatures parted, and the girl came darting up with the five ancients she had showed us before. They were evidently the council responsible for the government of the village, or something of the sort, for the other villagers bowed their heads respectfully as they pa.s.sed.

The girl came close to the port through which I was looking, and gestured earnestly. Her face was tense and anxious, and from time to time she glanced over her shoulder, as though she feared the coming of an enemy.

"Our time's short, I take it, if we are to be of service," said Mercer. "Come on, Taylor; into the diving suits!"

I signaled the girl that we understood, and would hurry. Then I followed Mercer into our tiny stateroom.

"Remember what I've told you," he said, as we slipped into the heavy woolen undergarments we were to wear inside the suits. "You understand how to handle your air, I believe, and you'll have no difficulty getting around in the suit if you'll just remember to go slowly. Your job is to get the whole village to get away when the enemy is sighted.

Get them to come this way from the village, towards the ship, understand. The current comes from this direction; the way the vegetation bends shows that. And keep the girl's people away until I signal you to let them return. And remember to take your electric lantern. Don't burn it more than is necessary; the batteries are not large and the bulb draws a lot of current. Ready?"

I was, but I was shaking a little as the men helped me into the mighty armor that was to keep the pressure of several atmospheres from crushing my body. The helmet was the last piece to be donned; when it was screwed in place I stood there like a mummy, almost completely rigid.

Quickly we were put into the air lock, together with a large iron box containing a number of things Mercer needed. Darkness and water rushed in on us. The water closed over my head. I became aware of the soft, continuous popping sounds of the air-bubbles escaping from the relief valve of the head-piece.

For a moment I was dizzy and more than a little nauseated. I could feel the cold sweat p.r.i.c.king my forehead. Then there was a sudden glow of light from before me, and I started walking towards it. I found I could walk now; not easily, but, after I caught the trick of it, without much difficulty. I could move my arms, too, and the interlocking hooks that served me for fingers. When my real fingers closed upon a little cross-bar at the end of the armored arms, and pulled the bars towards me, the steel claws outside came together, like a thumb and two fingers.

In a moment we stood upon the bottom of the ocean. I turned my head inside the helmet, and there, beside me, was the sleek, smooth side of the _Santa Maria_. On my other side was Mercer, a huge, dim figure in his diving armor. He made an awkward gesture towards his head, and I suddenly remembered something.

Before me, where I could operate it with a thrusting movement of my chin, was a toggle switch. I snapped it over, and heard Mercer's voice: "--n't forget everything I tell him."

"I know it," I said mentally to him. "I was rather rattled. O.K. now, however. Anything I can do?"

"Yes. Help me with this box, and then get the girl to put on the antenna you'll find there. Don't forget the knife and the light."

"Right!" I bent over the box with him, and we both came near falling.

We opened the lid, however, and I hooked the knife and the light into their proper places outside my armor. Then, with the antenna for the girl, so that we could establish connections with her, and through her, with the villagers, I moved off.

This antenna was entirely different from the one used in previous experiments. The four cross-members that clasped the head were finer, and at their junction was a flat black circular box, from which rose a black rod some six inches in height, and topped by a black sphere half the size of my fist.

These perfected thought-telegraphs (I shall continue to use my own designation for them, as clearer and more understandable than Mercer's) did not need connecting wires; they conveyed their impulses by Hertzian waves to a master receiver on the _Santa Maria_, which amplified them and re-broadcast them so that each of us could both send and receive at any time.

As I turned, I found the girl beside me, waiting anxiously. Behind her were the five ancients. I slipped the antenna over her head, and instantly she began telling me that danger was imminent.

To facilitate matters, I shall describe her messages as though she spoke; indeed, her pictures were as clear, almost, as speech in my native tongue. And at times she did use certain sound-words; it was in this way that I learned, by inference, that her name was _Imee_, that her people were called _Teemorn_ (this may have been the name of the community, or perhaps it was interchangeable--I am not sure) and that the shark-faced people were the _Rorn_.

"The Rorn come!" she said quickly. "Two days past, the three came again, and our old men refused to give up the slaves. Today they will return, these Rorn, and my people, the Teemorn will all be made dead!"

Then I told her what Mercer had said: that she and every one of her people must flee swiftly and hide, beyond the boat, a distance beyond the village. Mercer and I would wait here, and when the Rorn came, it was they who would be made dead, as we had promised. Although how, I admitted to myself, being careful to hide the thought that she might not sense it, I didn't know. We had been too busy since the girl's arrival to go into details.

She turned and spoke quickly to the old men. They looked at me doubtfully, and she urged them vehemently. They turned back towards the village, and in a moment the Teemorn were stalking by obediently, losing their slim white forms in the gloom behind the dim bulk of the _Santa Maria_, resting so quietly on the sand.

They were hardly out of sight when suddenly Mercer spoke through the antenna fitted inside my helmet.

"They're coming!" he cried. "Look above and to your right! The Rorn, as Imee calls them, have arrived!"

I looked up and beheld a hundred--no, a thousand!--shadowy forms darting down on the village, upon us. They, too, were just as the girl had pictured them: short, swart beings with but the suggestion of a nose, and with pulsing gill-covers under the angles of their jaws.

Each one gripped a long, slim white knife in either hand, and their tight-fitting shark-skin armor gleamed darkly as they swooped down upon us.

Eagerly I watched my friend. In the clasping talons of his left hand he held a long, slim flask that glinted even in that dim, confusing twilight. Two others, mates to the first, dangled at his waist.

Lifting it high above his head, he swung his metal-clad right arm, and shattered the flask he held in his taloned left hand.

For an instant nothing happened, save that flittering bits of broken gla.s.s shimmered their way to the sand. Then the horde of noseless ones seemed to dissolve, as hundreds of limp and sprawling bodies sank to the sand. Perhaps a half of that great mult.i.tude seemed struck dead.

"Hydrocyanic acid, Taylor!" cried Mercer exultantly. "Even diluted by the sea water, it kills almost instantly. Go back and make sure that none of the girl's people come back before the current has washed this away, or they'll go in the same fashion. Warn her to keep them back!"

I hurried toward the _Santa Maria_, thinking urgent warnings for Imee's benefit. "Stay back! Stay back, Imee! The Rorn are falling to the sand, we have made many of them dead, but the danger for you and your people is still here. Stay back!"

"Truly, do the Rorn become dead? I would like to see that with my own eyes. Be careful that they do not make you dead also, and your friend, for they have large brains, these Rorn."

"Do not come to see with your own eyes, or you will be as the Rorn!" I hurried around the submarine, to keep her back by force, if that were necessary. "You must--"

"Help, Taylor!" cut in a voice--Mercer's. "These devils have got me!"

"Right with you!" I turned and hurried back as swiftly as I could, stumbling over the bodies of dead Rorn that had settled everywhere on the clean yellow sand.

I found Mercer in the grip of six of the shark-faced creatures. They were trying desperately to stab him, but their knives bent and broke against the metal of his armor. So busy were they with him that they did not notice me coming up, but finding their weapons useless, they suddenly s.n.a.t.c.hed him up, one at either arm and either leg, and two grasping him by the head-piece, and darted away with him, carrying his bulging metal body between them like a battering ram, while he kicked and struggled impotently.

"They are taking him to the Place of Darkness!" cried Imee suddenly, having read my impressions of the scene. "Oh, go quickly, quickly, toward the direction of your best hand--to your right! I shall follow!"

"No! No! Stay back!" I warned her frantically. All but these six Rorn had fallen victims of Mercer's h.e.l.lish poison, and while they seemed to be suffering no ill effects, I thought it more than likely that some sly current might bring the deadly poison to the girl, did she come this way, and kill her as surely as it had killed these hundreds of Rorn.