"Yes. They want you to come to them at once."

"I shall. But the Council easily may decide upon something too rash."

He lowered his voice, and on his face Larry saw a strange, unfathomable look. "Princess, at any moment there may be a Robot uprising. Is the Power House well guarded by humans?"

"Yes," she said.

"No Robots in or about it? Tina, I do not want to frighten you, but I think our first efforts should be for defense. The Council acts slowly and stubbornly. What I advise them to do may be done, and may not. I was thinking. If we could get to the Power House--Do you realize, Tina, that if the Robots should suddenly break into rebellion, they would attack first of all the Power House?[5] It was my idea--"

[Footnote 5: The Power House on the Hudson dam was operated by inert machinery and manned entirely by humans--the only place in the city which was so handled. This was because of its extreme importance. The air-power was broadcast from there. Without that power the entire several hundred mile district around New York would be dead. No aircraft could enter, save perhaps some skilfully handled motorless glider, if aided by sufficiently fortuitous air currents. Every surface vehicle used this power, and every sub-sea freighter. The city lights, and every form of city power, were centralized here also, as well as the broadcasting audible and etheric transmitters and receivers. Without the Power House, New York City and all its neighborhood would be inoperative, and cut off from the outside world.]

Tugh suddenly broke off, and all stood listening. There was a commotion overhead in the palace. They heard the thud of running footsteps; human voices raised to shouts; and, outside the palace, other voices. A ventilating shaft nearby brought them down plainly.

There were the guttural, hollow voices of shouting Robots, the clank of their metal bodies; the ring of steel, as though with sword-blades they were thumping their metal thighs.

A Robot mob was gathered close outside the palace walls. The revolt of the Robots had come!

CHAPTER XVIII

_Tugh, the Clever Man_

"Sit quiet, George Rankin. And you, Mistress Mary; you will both be quite safe with Migul if you are docile."

Tugh stood before us. We were in a dim recess of a great cavern with the throb of whirring machinery around us. It was the same day which I have just described; Larry was at this moment asleep in the palace room. Tugh and Tina had come searching for Migul; and Tugh had contrived to send Tina back. Then he had come directly to us, finding us readily since we were hidden where he had told Migul to hide us.

This cavern was directly beneath the Robot laboratory in which the Time-traveling cage was placed. A small spiral stairway led downward some two levels, opening into a great, luridly lighted room. Huge inert machines stood about. Great wheels were flashing as they revolved, turning the dynamos to generate the several types of current used by the city's underground industrial activities.

It was a tremendous subterranean room. I saw only one small section of it; down the blue-lit aisles the rows of machines may have stretched for half a mile or more. The low hum of them was an incessant pound against my senses. The great inert mechanisms had tiny lights upon them which gleamed like eyes. The illumined gauge-faces--each of them I pa.s.sed seemed staring at me. The bra.s.s jackets were polished until they shone with the sheen of the overhead tube lights; the giant wheels flashed smoothly upon oiled bearings. They were in every fashion of shape and size, these inert machines. Some towered toward the metal-beamed ceiling, with great swaying pendulums that ticked like a giant clock. Some clanked with eccentric cams--a jarring rhythm as though the heart of the thing were limping with its beat. Others had a ragged, frightened pulse; others stood placid, outwardly motionless under smooth, polished cases, but humming inside with a myriad blended sounds.

Inert machines. Yet some were capable of locomotion. There was a small truck on wheels which were set in universal joints. Of its own power--radio controlled perhaps, so that it seemed acting of its own volition--it rolled up and down one of the aisles, stopping at set intervals and allowing a metal arm lever in it to blow out a tiny jet of oil. One of the attending Robots encountered it in an aisle, and the cart swung automatically aside. The Robot spoke to the cart; ordered it away; and the tone of his order, registering upon some sensitive mechanism, whirled the cart around and sent it rolling to another aisle section.

The strange perfection of machinery! I realized there was no line sharply to be drawn between the inert machine and the sentient, thinking Robots. That cart, for instance, was almost a connecting link.

There were also Robots here of many different types. Some of them were eight or ten feet in stature, in the fashion of a man: Migul was of this design. Others were small, with bulging foreheads and bulging chest plates: Larry saw this type as domestics in the palace. Still others were little pot-bellied things with bent legs and long thin arms set crescent-shape. I saw one of these peer into a huge cha.s.sis of a machine, and reach in with his curved arm to make an interior adjustment....

Migul had brought Mary Atwood and me in the larger cage, from that burned forest of the year 762, where with the disintegrating ray-gun Tugh had killed Harl. The body of Harl in a moment had melted into putrescence, and dried, leaving only the skeleton within the clothes.

The white-ray, Tugh had called his weapon. We were destined very shortly to have many dealings with it.

Tugh had given Migul its orders. Then Tugh took Harl's smaller cage and flashed away to meet Tina and Larry in 1777, as I have already described.

And Migul brought us here to 2930. As we descended the spiral staircase and came into the cavern, it stood with us for a moment.

"That's wonderful," the Robot said proudly. "I am part of it. We are machinery almost human."

Then it led us down a side aisle of the cavern and into a dim recess.

A great transparent tube bubbling with a violet fluorescence stood in the alcove s.p.a.ce. Behind it in the wall Migul slid a door, and we pa.s.sed through, into a small metal room. It was bare, save for two couch-seats. With the door closed upon us, we waited through an interval. How long it was, I do not know; several hours, possibly.

Migul told us that Tugh would come. The giant mechanism stood in the corner, and its red-lit eyes watched us alertly. It stood motionless, inert, tireless--so superior to a human in this job, for it could stand there indefinitely.

We found food and drink here. We talked a little; whispered; and I hoped Migul, who was ten feet away, could not hear us. But there was nothing we could say or plan.

Mary slept a little. I had not thought that I could sleep, but I did too; and was awakened by Tugh's entrance. I was lying on the couch; Mary had left hers and was sitting now beside me.

Tugh slid the door closed after him and came toward us, and I sat up beside Mary. Migul was standing motionless in the corner, exactly where he had been hours before.

"Well enough, Migul," Tugh greeted the Robot. "You obey well."

"Master, yes. Always I obey you; no one else."

I saw Tugh glance at the mechanism keenly. "Stand aside, Migul. Or no, I think you had better leave us. Just for a moment, wait outside."

"Yes, Master."

It left, and Tugh confronted us. "Sit where you are," he said. "I a.s.sume you are not injured. You have been fed? And slept, perhaps! I wish to treat you kindly."

"Thanks," I said. "Will you not tell us what you are going to do with us?"

He stood with folded arms. The light was dim, but such as it was it shone full upon him. His face was, as always, a mask of imperturbability.

"Mistress Mary knows that I love her."

He said it with a startlingly calm abruptness. Mary shuddered against me, but she did not speak. I thought possibly Tugh was not armed; I could leap upon him. Doubtless I was stronger than he. But outside the door Migul was armed with a white-ray.

"I love her as I have always loved her.... But this is no time to talk of love. I have much on my mind; much to do."

He seemed willing to talk now, but he was talking more for Mary than for me. As I watched him and listened, I was struck with a queerness in his manner and in his words. Was he irrational, this exile of Time who had impressed his sinister personality upon so many different eras? I suddenly thought so. Demented, or obsessed with some strange purpose? His acts as well as his words, were strange. He had devastated the New York of 1935 because its officials had mistreated him. He had done many strange, sinister, murderous things.

He said, with his gaze upon Mary, "I am going to conquer this city here. There will follow the rule of the Robots--and I will be their sole master. Do you want me to tell you a secret? It is I who have actuated these mechanisms to revolt." His eyes held a cunning gleam.

Surely this was a madman leering before me.

"When the revolt is over," he went on, "I will be master of New York.

And that mastery will spread. The Robots elsewhere will revolt to join my rule, and there will come a new era. I may be master of the world; who knows? The humans who have made the Robots slaves for them will become slaves themselves. Workers! It is the Robots' turn now. And I--Tugh--will be the only human in power!"

These were the words of a madman! I could imagine that he might stir these mechanical beings to a temporarily successful revolt: he might control New York City; but the great human nations of the world could not be overcome so easily.

And then I remembered the white-ray. A giant projector of that ray would melt human armies as though they were wax; yet the metal Robots could stand its blast unharmed. Perhaps he was no madman....

He was saying, "I will be the only human ruler. Tugh will be the greatest man on Earth! And I do it for you, Mistress Mary--because I love you. Do not shudder."

He put out his hand to touch her, and when she shrank away I saw the muscles of his face twitch in a fashion very odd. It was a queer, wholly repulsive grimace.

"So? You do not like my looks? I tried to correct that, Mary. I have searched through many eras, for surgeons with skill to make me like other men. Like this young man here, for instance--you. George Rankin, I am glad to have you; do not fear I will harm you. Shall I tell you why?"