Allan Randall stared at the man before him. “And that’s why you sent for me, Milton?” he finally asked.

The other’s face was unsmiling. “That’s why I sent for you, Allan,” he said quietly. “To go to Mars with us to-night!”

There was a moment’s silence, in which Randall’s eyes moved as though uncomprehendingly from the face of Milton to those of the two men beside him. The four sat together at the end of a roughly furnished and electric-lit living-room, and in that momentary silence there came in to them from the outside night the distant pounding of the Atlantic upon the beach. It was Randall who first spoke again.

“To Mars!” he repeated. “Have you gone crazy, Milton--or is this some joke you’ve put up with Lanier and Nelson here?”

Milton shook his head gravely. “It is not a joke, Allan. Lanier and I are actually going to flash out over the gulf to the planet Mars to-night. Nelson must stay here, and since we wanted three to go I wired you as the most likely of my friends to make the venture.”

“But good God!” Randall exploded, rising. “You, Milton, as a physicist ought to know better. Space-ships and projectiles and all that are but fictionists’ dreams.”

“We are not going in either space-ship or projectile,” said Milton calmly. And then as he saw his friend’s bewilderment he rose and led the way to a door at the room’s end, the other three following him into the room beyond.

It was a long laboratory of unusual size in which Randall found himself, one in which every variety of physical and electrical apparatus seemed represented. Three huge dynamo-motor arrangements took up the room’s far end, and from them a tangle of wiring led through square black condensers and transformers to a battery of great tubes. Most remarkable, though, was the object at the room’s center.

It was like a great double cube of dull metal, being in effect two metal cubes each twelve feet square, supported a few feet above the floor by insulated standards. One side of each cube was open, exposing the hollow interiors of the two cubical chambers. Other wiring led from the big electronic tubes and from the dynamos to the sides of the two cubes.

The four men gazed at the enigmatic thing for a time in silence.

Milton’s strong, capable face showed only in its steady eyes what feelings were his, but Lanier’s younger countenance was alight with excitement; and so too to some degree was that of Nelson. Randall simply stared at the thing, until Milton nodded toward it.

“That,” he said, “is what will flash us out to Mars to-night.”

Randall could only turn his stare upon the other, and Lanier chuckled.

“Can’t take it in yet, Randall? Well, neither could I when the idea was first sprung on us.”

Milton nodded to seats behind them, and as the half-dazed Randall sank into one the physicist faced him earnestly.

“Randall, there isn’t much time now, but I am going to tell you what I have been doing in the last two years on this God-forsaken Maine coast. I have been for those two years in unbroken communication by radio with beings on the planet Mars!

“It was when I still held my physics professorship back at the university that I got first onto the track of the thing. I was studying the variation of static vibrations, and in so doing caught steady signals--not static--at an unprecedentedly high wave-length.

They were dots and dashes of varying length in an entirely unintelligible code, the same arrangement of them being sent out apparently every few hours.

“I began to study them and soon ascertained that they could be sent out by no station on earth. The signals seemed to be growing louder each day, and it suddenly occurred to me that Mars was approaching opposition with earth! I was startled, and kept careful watch. On the day that Mars was closest the earth the signals were loudest.

Thereafter, as the red planet receded, they grew weaker. The signals were from some being or beings on Mars!

“At first I was going to give the news to the world, but saw in time that I could not. There was not sufficient proof, and a premature statement would only wreck my own scientific reputation. So I decided to study the signals farther until I had irrefutable proof, and to answer them if possible. I came up here and had this place built, and the aerial towers and other equipment I wanted set up. Lanier and Nelson came with me from the university, and we began our work.

“Our chief object was to answer those signals, but it proved heartbreaking work at first. We could not produce a radio wave of great enough length to pierce out through earth’s insulating layer and across the gulf to Mars. We used all the power of our great windmill-dynamo hook-ups, but for long could not make it. Every few hours like clockwork the Martian signals came through. Then at last we heard them repeating one of our own signals. We had been heard!

“For a time we hardly left our instruments. We began the slow and almost impossible work of establishing intelligent communication with the Martians. It was with numbers we began. Earth is the third planet from the sun and Mars the fourth, so three represented earth and four stood for Mars. Slowly we felt our way to an exchange of ideas, and within months were in steady and intelligent communication with them.

“They asked us first concerning earth, its climates and seas and continents, and concerning ourselves, our races and mechanisms and weapons. Much information we flashed out to them, the language of our communication being English, the elements, of which they had learned, with a mixture of numbers and symbolical dot-dash signals.

“We were as eager to learn about them. They were somewhat reticent, we found, concerning their planet and themselves. They admitted that their world was a dying one and that their great canals were to make life possible on it, and also admitted that they were different in bodily form from ourselves.

“They told us finally that communication like this was too ineffective to give us a clear picture of their world, or vice versa.

If we could visit Mars, and then they visit earth, both worlds would benefit by the knowledge of the other. It seemed impossible to me, though I was eager enough for it. But the Martians said that while spaceships and the like were impossible, there was a way by which living beings could flash from earth to Mars and back by radio waves, even as our signals flashed!”

Randall broke in in amazement. “By radio!” he exclaimed, and Milton nodded.

“Yes, so they said, nor did the idea of sending matter by radio seem too insane, after all. We send sound, music by radio waves across half the world from our broadcasting stations. We send light, pictures, across the world from our television stations. We do that by changing the wave length of the light-vibrations to make them radio vibrations, flashing them out thus over the world, to receivers which alter their wave-lengths again and change them back into light-vibrations.

“Why then could not matter be sent in the same way? Matter, it has been long believed, is but another vibration of the ether, like light and radiant heat and radio vibrations and the like, having a lower wave-length than any of the others. Suppose we take matter and by applying electrical force to it change its wave-length, step it up to the wave-length of radio vibrations? Then those vibrations can be flashed forth from the sending station to a special receiver that will step them down again from radio vibrations to matter vibrations. Thus matter, living or non-living, could be flashed tremendous distances in a second!

“This the Martians told us, and said they would set up a matter-transmitter and receiver on Mars and would aid and instruct us so that we could set up a similar transmitter and receiver here. Then part of us could be flashed out to Mars as radio vibrations by the transmitter, and in moments would have flashed across the gulf to the red planet and would be transformed back from radio vibrations to matter-vibrations by the receiver awaiting us there!

“Naturally we agreed enthusiastically to build such a matter-transmitter and receiver, and then, with their instructions signalled to us constantly, started the work. Weeks it took, but at last, only yesterday, we finished it. The thing’s two cubical chambers are one for the transmitting of matter and the other for its reception. At a time agreed on yesterday we tested the thing, placing a guinea pig in the transmitting chamber and turning on the actuating force. Instantly the animal vanished, and in moments came a signal from the Martians saying that they had received it unharmed in their receiving chamber.

“Then we tested it the other way, they sending the same guinea pig to us, and in moments it flashed into being in our receiving chamber. Of course the step-down force in the receiving chamber had to be in operation, since had it not been at that moment the radio-vibrations of the animal would have simply flashed on endlessly in endless space.

And the same would happen to any of us were we flashed forth and no receiving chamber turned on to receive us.

“We signalled the Martians that all tests were satisfactory, and told them that on the next night at exactly midnight by our time we would flash out ourselves on our first visit to them. They have promised to have their receiving chamber operating to receive us at that moment, of course, and it is my plan to stay there twenty-four hours, gathering ample proofs of our visit, and then flash back to earth.

“Nelson must stay here, not only to flash us forth to-night, but above all to have the receiving chamber operating to receive us at the destined moment twenty-four hours later. The force required to operate it is too great to use for more than a few minutes at a time, so it is necessary above all that that force be turned on and the receiving chamber ready for us at the moment we flash back. And since Nelson must stay, and Lanier and I wanted another, we wired you, Randall, in the hope that you would want to go with us on this venture. And do you?”

As Milton’s question hung, Randall drew a long breath. His eyes were on the two great cubical chambers, and his brain seemed whirling at what he had heard. Then he was on his feet with the others.

“Go? Could you keep me from going? Why, man, it’s the greatest adventure in history!”

Milton grasped his hand, as did Lanier, and then the physicist shot a glance at the square clock on the wall. “Well, there’s little enough time left us,” he said, “for we’ve hardly an hour before midnight, and at midnight we must be in that transmitting chamber for Nelson to send us flashing out!”

Randall could never recall but dimly afterward how that tense hour passed. It was an hour in which Milton and Nelson went with anxious faces and low-voiced comments from one to another of the pieces of apparatus in the room, inspecting each carefully, from the great dynamos to the transmitting and receiving chambers, while Lanier quickly got out and made ready the rough khaki suits and equipment they were to take.

It lacked but a quarter-hour of midnight when they had finally donned those suits, each making sure that he was in possession of the small personal kit Milton had designated. This included for each a heavy automatic, a small supply of concentrated foods, and a small case of drugs chosen to counteract the rarer atmosphere and lesser gravity which Milton had been warned to expect on the red planet. Each had also a strong wrist-watch, the three synchronized exactly with the big laboratory clock.

When they had finished checking up on this equipment the clock’s longer hand pointed almost to the figure twelve, and the physicist gestured expressively toward the transmitting chamber. Lanier, though, strode for a moment to one of the laboratory’s doors and flung it open. As Randall gazed out with him they could see far out over the tossing sea, dimly lit by the great canopy of the summer stars overhead. Right at the zenith among those stars shone brightest a crimson spark.

“Mars,” said Lanier, his voice a half-whisper. “And they’re waiting out there for us now--out there where we’ll be in minutes!”

“And if they shouldn’t be waiting--their receiving chamber not ready--”

But Milton’s calm voice came across the room to them: “Zero hour,” he said, stepping up into the big transmitting chamber.

Lanier and Randall slowly followed, and despite himself a slight shudder shook the latter’s body as he stepped into the mechanism that in moments would send him flashing out through the great void as impalpable ether-vibrations. Milton and Lanier were standing silent beside him, their eyes on Nelson, who stood watchfully now at the big switchboard beside the chambers, his own gaze on the clock. They saw him touch a stud, and another, and the hum of the great dynamos at the room’s end grew loud as the swarming of angry bees.

The clock’s longer hand was crawling over the last space to cover the smaller hand. Nelson turned a knob and the battery of great glass tubes broke into brilliant white light, a crackling coming from them.

Randall saw the clock’s pointer clicking over the last divisions, and as he saw Nelson grip a great switch there came over him a wild impulse to bolt from the transmitting chamber. But then as his thoughts whirled maelstromlike there came a clang from the clock and Nelson flung down the switch in his grasp. Blinding light seemed to break from all the chamber onto the three; Randall felt himself hurled into nothingness by forces titanic, inconceivable, and then knew no more.

Randall came back to consciousness with a humming sound in his ears and with a sharp pain piercing his lungs at every breath. He felt himself lying on a smooth hard surface, and heard the humming stop and be succeeded by a complete silence. He opened his eyes, drawing himself to his feet as Milton and Lanier were doing, and stared about him.

He was standing with his two friends inside a cubical metal chamber almost exactly the same as the one they had occupied in Milton’s laboratory a few moments before. But it was not the same, as their first astounded glance out through its open side told them.

For it was not the laboratory that lay around them, but a vast conelike hall that seemed to Randall’s dazed eyes of dimensions illimitable. Its dull-gleaming metal walls slanted up for a thousand feet over their heads, and through a round aperture at the tip far above and through great doors in the walls came a thin sunlight. At the center of the great hall’s circular floor stood the two cubical chambers in one of which the three were, while around the chambers were grouped masses of unfamiliar-looking apparatus.

To Randall’s untrained eyes it seemed electrical apparatus of very strange design, but neither he nor Milton nor Lanier paid it but small attention in that first breathless moment. They were gazing in fascinated horror at the scores of creatures who stood silent amid the apparatus and at its switches, gazing back at them. Those creatures were erect and roughly man-like in shape, but they were not human men. They were--the thought blasted to Randall’s brain in that horror-filled moment--crocodile-men.

Crocodile-men! It was only so that he could think of them in that moment. For they were terribly like great crocodile shapes that had learned in some way to carry themselves erect upon their hinder limbs.

The bodies were not covered with skin, but with green bony plates. The limbs, thick and taloned at their paw-ends, seemed greater in size and stronger, the upper two great arms and the lower two the legs upon which each walked, while there was but the suggestion of a tail. But the flat head set on the neckless body was most crocodilian of all, with great fanged, hinged jaws projecting forward, and with dark unwinking eyes set back in bony sockets.

Each of the creatures wore on his torso a gleaming garment like a coat of metal scales, with metal belts in which some had shining tubes.

They were standing in groups here and there about the mechanisms, the nearest group at a strange big switch-panel not a half-dozen feet from the three men. Milton and Lanier and Randall returned in a tense silence the unwinking stare of the monstrous beings around them.

“The Martians!” Lanier’s horror-filled exclamation was echoed in the next instant by Randall’s.

“The Martians! God, Milton! They’re not like anything we know--they’re reptilian!”

Milton’s hand clutched his shoulder. “Steady, Randall,” he muttered.

“They’re terrible enough, God knows--but remember we must seem just as grotesque to them.”

The sound of their voices seemed to break the great hall’s spell of silence, and they saw the crocodilian Martians before them turning and speaking swiftly to each other in low hissing speech-sounds that were quite unintelligible to the three. Then from the small group nearest them one came forward, until he stood just outside the chamber in which they were.

Randall felt dimly the momentousness of the moment, in which beings of earth and Mars were confronting each other for the first time in the solar system’s history. The creature before them opened his great jaws and uttered slowly a succession of sounds that for the moment puzzled them, so different were they from the hissing speech of the others, though with the same sibilance of tone. Again the thing repeated the sounds, and this time Milton uttered an exclamation.

“He’s speaking to us!” he cried. “Trying to speak the English that I taught them in our communication! I caught a word--listen...”

As the creature repeated the sounds, Randall and Lanier started to hear also vaguely expressed in that hissing voice familiar words:

“You--are Milton and--others from--earth?”

Milton spoke very clearly and slowly to the creature: “We are those from earth,” he said. “And you are the Martians with whom we have communicated?”

“We are those Martians,” said the other’s hissing voice slowly.

“These”--he waved a taloned paw toward those behind him--”have charge of the matter-transmitter and receiver. I am of our ruler’s council.”

“Ruler?” Milton repeated. “A ruler of all Mars?”

“Of all Mars,” the other said. “Our name for him would mean in your words the Martian Master. I am to take you to him.”

Milton turned to the other two with face alight with excitement.

“These Martians have some supreme ruler they call the Martian Master,” he said quickly; “and we’re to go before him. As the first visitors from earth we’re of immense importance here.”

As he spoke, the Martian official before them had uttered a hissing call, and in answer to it a long shape of shining metal raced into the vast hall and halted beside them. It was like a fifty-foot centipede of metal, its scores of supporting short legs actuated by some mechanism inside the cylindrical body. There was a transparent-walled control room at the front end of that body, and in it a Martian at the controls who snapped open a door from which a metal ladder automatically descended.

The Martian official gestured with a reptilian arm toward the ladder, and Milton and Lanier and Randall moved carefully out of the cube-chamber and across the floor to it, each of their steps being made a short leap forward by the lesser gravity of the smaller planet.

They climbed up into the centipede-machine’s control room, their guide following, and then as the door snapped shut, the operator of the thing pulled and turned the knob in his grasp and the long machine scuttled forward with amazing smoothness and speed.

In a moment it was out of the building and into the feeble sunlight of a broad metal-paved street. About them lay a Martian city, seen by their eager eyes for the first time. It was a city whose structures were giant metal cones like that from which they had just come, though none seemed as large as that titanic one. Throngs of the hideous crocodilian Martians were moving busily to and fro in the streets, while among them there scuttled and flashed numbers of the centipede-machines.

As their strange vehicle raced along, Randall saw that the conelike structures were for the most part divided into many levels, and that inside some could be glimpsed ranks of great mechanisms and hurrying Martians tending them. Away to their right across the vast forest of cones that was the city the sun’s little disk was shining, and he glimpsed in that direction higher ground covered with a vast tangle of bright crimson jungle that sloped upward from a great, half-glimpsed waterway.

The Martian beside them saw the direction of his gaze and leaned toward him. “No Martians live there,” he hissed slowly. “Martians live only in cities where canals meet.”

“Then there’s no life in those crimson jungles?” Randall asked, repeating the question a moment later more slowly.

“No Martians there, but life--living things,” the other told him, searching for words. “But not intelligent, like Martians and you.”

He turned to gaze ahead, then pointed. “The Martian Master’s cone,” he hissed.

The three saw that at the end of the broad metal street down which their vehicle was racing there loomed another titanic cone-structure, fully as large as the mighty one in which they first found themselves.

As the centipede-machine swept up to its great door-opening and halted, they descended to the metal paving and then followed their reptilian guide through the opening.

They found themselves in a great hall in which scores of the Martians were coming and going. At the hall’s end stood a row of what seemed guards, Martians grasping shining tubes such as they had already glimpsed. These gave way to allow their passage when their conductor uttered a hissing order, and then they were moving down a shorter hall at whose end also were guards. As these sprang aside before them, a great door of massive metal they guarded moved softly upward, disclosing a mighty circular hall or room inside. Their crocodilian guide turned to them.

“The hall of the Martian Master,” he hissed.

They passed inside with him. The great hall seemed to extend upward to the giant cone’s tip, thin light coming down from an opening there.

Upon the dull metal of its looming walls were running friezes of lighter metal, grotesque representations of reptilian shapes that they could but vaguely glimpse. Around the walls stood rank after rank of guards.

At the hall’s center was a low dias, and in a semicircle around and behind it stood a half-hundred great crocodilian shapes. Randall guessed even at the moment that they were the council of which their conductor had named himself a member. But like Milton and Lanier, he had eyes in that first moment only for the dais itself. For on it was--the Martian Master.

Randall heard Milton and Lanier choke with the horror that shook his own heart and brain as he gazed. It was not simply another great crocodilian shape that sat upon that dais. It was a monstrous thing formed by the joining of three of the great reptilian bodies! Three distinct crocodile-like bodies sitting close together upon a metal seat, that had but a single great head. A great, grotesque crocodilian head that bulged backward and to either side, and that rested on the three thick short necks that rose from the triple body! And that head, that triple-bodied thing, was living, its unwinking eyes gazing at the three men!

The Martian Master! Randall felt his brain reel as he gazed at that mind-shattering thing. The Martian Master--this great head with three bodies! Reason told Randall, even as he strove for sanity, that the thing was but logical, that even on earth biologists had formed multiple-headed creatures by surgery, and that the Martians had done so to combine in one great head, one great brain, the brains of three bodies. Reason told him that the great triple brain inside that bulging head needed the bloodstreams of all three bodies to nourish it, must be a giant intellect indeed, one fitted to be the supreme Martian Master. But reason could not overcome the horror that choked him as he gazed at the awful thing.

A hissing voice sounding before him made him aware that the Martian Master was speaking.

“You are the Earth-beings with whom we communicated, and whom we instructed to build a matter-transmitter and receiver on earth?” the slow voice asked. “You have come safely to Mars by means of that station?”

“We have come safely.” Milton’s voice was shaken and he could find no other words.

“That is well. Long had we desired to have such a station built on earth, since with it there to flash back and forth between the two worlds is easy. You have come, then, to learn of this world and to take back what you learn to your races?”

“That is why we came.” Milton said, more steadily. “We want to stay only hours on this first visit, and then flash back to earth as we came.”

The head’s awful eyes seemed to consider them. “But when do you intend to go back?” its strange voice asked. “Unless the one at your earth station has its receiver operating at the right moment you will simply flash on endlessly as radio waves--will be annihilated.”

Milton found the courage to smile. “We started from earth at our midnight exactly, and at midnight exactly twenty-four earth hours later, we are to flash back and the receiver will be awaiting us.”

There was silence when he had said that, a silence that seemed to Randall’s strained mind to have become suddenly tense, sinister. The great triple-bodied creature before them considered them again, its eyes moving over them, and when it again spoke the hissing words came very slowly.

“Twenty-four earth hours,” it said; “and then your receiver on earth will be awaiting you. That time we can measure to the moment, and that is well. For it is not you three Earth-beings who will flash back to earth when that moment comes! It will be Martians, the first of our Martian masses who have waited for ages for that moment and who will begin then our conquest of the earth!

“Yes, Earth-beings, our great plan comes to its end now at last! At last! Age on age, prisoned on this dying, arid world, we have desired the earth that by right of power shall be ours, have sought for ages to communicate with its beings. You finally heard us, you hearkened to us, you built the matter-transmitting and receiving station on earth that was the one thing needed for our plan. For when the matter-receiver of that station is turned on in twenty-four of your hours, and ready to receive matter flashes from here, it will be the first of our millions who will flash at last to earth!

“I, the Martian Master, say it. Those first to go shall seize that matter-receiver on earth when first they appear there, shall build other and larger receivers, and through them within days all our Martian hordes shall have been flashed to earth! Shall have poured out over it and conquered with our weapons your weak races of Earth-beings, who cannot stand before us, and whose world you have delivered at last into our hands!”

For a moment, when the great monster’s hissing voice had ceased, Milton and Randall and Lanier gazed toward it as though petrified, the whole unearthly scene spinning about them. And then, through the thick silence, the thin sound of Milton’s voice:

“Our world--our earth--delivered to the Martians, and by us! God--no!”

With that last cry of agonized comprehension and horror, Milton did what surely had never any in the great hall expected, leaped onto the dais with a single spring toward the Martian Master! Randall heard a hundred wild hissing cries break from about him, saw the crocodilian forms of guards and council rushing forward even as he and Lanier sprang after Milton, and then glimpsed shining tubes levelled from which brilliant shafts of dazzling crimson light or force were stabbing toward them!

To Randall the moment that followed was but a split-second flash and whirl of action. As his earthly muscles took him forward with Lanier after Milton in a great leap to the dais, he was aware of the brilliant red rays stabbing behind him closely, and knew that only the tremendous size of his leap had taken him past them. In the succeeding instant he was made aware of what he had escaped, for the hastily-loosed rays struck squarely a group of three or four Martian guards rushing to the dais from the opposite side, and they vanished from view with a sharp detonation as though clicked out of existence!

Randall was not to know then, that the red rays were ones that annihilated matter by neutralizing or damping the matter-vibrations in the ether. But he did know that no more rays were loosed, for by then he and Milton and Lanier were on the dais and were wrapped in a hurricane combat with the guards that had rushed between them and the Martian Master.

Gleaming fangs--great scaled forms--reaching talons--it was all a wild phantasmagoria of grotesque forms spinning around him as he struck with all the power of his earthly muscles and felt crocodilian forms staggering and going down beneath his frenzied blows. He heard the roar of an automatic close beside him in the melee as Milton remembered at last through the red haze of his fury the weapon he carried, but before either Randall or Lanier could reach their own weapons a new wave of crocodilian forms had poured onto them that by sheer pressing weight held them helpless, to be disarmed.