"Wait! I thought I heard something."

In the dead, heavy silence Larry found that there was much to hear.

Voices very dim from the palace overhead; infinitely faint music; the clammy sodden drip of moisture from the tunnel roof. And, permeating everything, the faint hum of machinery.

Tina touched him in the gloom. "It's nothing, I guess. Though I thought I heard a man's voice."

"Overhead?"

"No; down here."

There was a dark, arched door near at hand. Tina entered it and fumbled for a switch, and in the soft light that came Larry saw an unoccupied apartment very similar to the one he had had upstairs, save that this was much smaller.

"Harl's room," said Tina. She prowled along the wall where audible book-cylinders[4] stood in racks, searching for a t.i.tle. Presently she found a hidden switch, pressed it, and a small section of the case swung out, revealing a concealed compartment. Larry saw her fingers trembling as she drew out a small bra.s.s cylinder.

[Footnote 4: Cylinder records of books which by machinery gave audible rendition, in similar fashion to the radio-phonograph.]

"This must be it, Larry," she said.

They took it to a table which held a shaded light. Within the cylinder was a scroll of writing. Tina unrolled it and held it under the light, while Larry stood breathless, watching her.

"Is it what you wanted?" Larry murmured.

"Yes. Poor Harl!"

She read aloud to Larry the gist of it in the few closing paragraphs.

"... and so I want to confess to you that I have been taking credit for that which is not mine. I wish I had the courage to tell you personally; someday I think I shall. I did not help Tugh invent our Time-traveling cages. I was in the palace garden one night some years ago when the cage appeared. Tugh is a man from a future Time-world; just what date ahead of now, I do not know, for he has never been willing to tell me. He captured me. I promised him I would say nothing, but help him pretend that we had invented the cage he had brought with him from the future. Tugh told me he invented them. It was later that he brought the other cage here.

"I was an obscure young man here a few years ago. I loved you even then, Tina: I think you have guessed that. I yielded to the temptation--and took the credit with Tugh.

"I do love you, though I think I shall never have the courage to tell you so.

Harl."

Tina rolled up the paper. "Poor Harl! So all the praise we gave him for his invention was undeserved!"

But Larry's thoughts were on Tugh. So the fellow was not of this era at all! He had come from a Time still further in the future!

A step sounded in the doorway behind them. They swung around to find Tugh standing there, with his thick misshapen figured huddled in the black cloak.

"Tugh!"

"Yes, Princess, no less than Tugh. Alent told me as I came through that you were down here. I saw your light, here in Harl's room and came."

"Did you find Migul and his captives--the girl from 1777 and the man of 1935?"

"No, Princess, Migul has fled with them," was the cripple's answer. He advanced into the room and pushed back his black hood. The blue light shone on his ma.s.sive-jawed face with a lurid sheen. Larry stood back and watched him. It was the first time that he had had opportunity of observing Tugh closely. The cripple was smiling sardonically.

"I have no fear for the prisoners," he added in his suave, silky fashion. "That crazy mechanism would not dare harm them. But it has fled with them into some far-distant recess of the caverns. I could not find them."

"Did you try?" Larry demanded abruptly.

Tugh swung on him. "Yes, young sir, I tried." It seemed that Tugh's black eyes narrowed; his heavy jaw clicked as he snapped it shut. The smile on his face faded, but his voice remained imperturbable as he added:

"You are aggressive, young Larry--but to no purpose.... Princess, I like not the att.i.tude of the Robots. Beyond question some of them must have seen Migul, but they would not tell me so. I still think I can control them, though. I hope so."

Larry could think of nothing to say. It seemed to him childish that he should stand listening to a scoundrel tricking this girl Tina. A dozen wild schemes of what he might do to try and rescue Mary Atwood and me revolved in his mind, but they all seemed wholly impractical.

"The Robots are working badly," Tugh went on. "In the north district one of the great foundries where they are casting the plates for the new Inter-Allied airliner has ceased operations. The Robot workmen were sullen, inefficient, neglectful. The inert machinery was ill cared for, and it went out of order. I was there, Princess, for an hour or more to-day. They have started up again now; it was fundamentally no more than a burned bearing which a Robot failed to oil properly."

"Is that what you call searching for Migul?" Larry burst out. "Tina, see here--isn't there something we can do?" Larry found himself ignoring Tugh. "I'm not going to stand around! Can't we send a squad of police after Migul?--go with them--actually make an effort to find them? This man Tugh certainly has not tried!"

"Have I not?" Tugh's cloak parted as he swung on Larry. His bent legs were twitching with his anger; his voice was a harsh rasp. "I like not your insolence. I am doing all that can be done."

Larry held his ground as Tugh fronted him. He had a wild thought that Tugh had a weapon under his cloak.

"Perhaps you are," said Larry. "But to me it seems--"

Tugh turned away. His gaze went to the cylinder which Tina was still clutching. His sardonic smile returned.

"So Harl made a confession, Princess?"

"That," she said, "is none--"

"Of my affair? Oh, but it is. I was here in the archway and I heard you read it. A very nice young man, was Harl. I hope Migul has not murdered him."

"You come from future Time?" Tina began.

"Yes, Princess! I must admit it now. I invented the cages."

Larry murmured to himself, "You stole them, probably."

"But my Government and I had a quarrel, so I decided to leave my own Time-world and come back to yours--permanently. I hope you will keep the secret. I have been here so long. Princess, I am really one of you now. At heart, certainly."

"From when did you come?" she demanded.

He bowed slightly. "I think that may remain my own affair, Tina. It is through no fault of mine I am outlawed. I shall never return." He added earnestly, "Do not you think we waste time? I am agreed with young Larry that something drastic must be done about Migul. Have you seen the Council about it to-day?"