"I imagine," said Tugh wryly, "he is rather busy to consider reporting such a trifle. But your friends are there. I was thinking: if we could go there now--You know the secret underground route, Tina."

The Princess was silent. A foreboding swept Larry; but he was tempted, for above everything he wanted to join Mary and me. A confusion--understandable enough in the midst of all this chaos--was upon Larry and Tina; it warped their better judgment. And Larry, fearing to influence Tina wrongly, said nothing.

"Do you know the underground route?" Tugh repeated.

"Yes, I know it."

"Then take us. We are all unarmed, but what matter? Bring this Larry, if you wish; we will join his two friends. The Council, Tina, is doing nothing here. They stay here because they think it is the safest place. In the Power House you and I will be of help. There are only six guards there; we will be three more; five more with Mary Atwood and this George. The Power House aerial telephone must be in communication with the outside world, and ships with help for us will be arriving. There must be some intelligent direction!"

The three of them were descending into the lower corridor of the palace, with Tina tempted but still half unconvinced. The corridors were deserted at the moment. The little domestic Robots of the palace, unaffected by the revolt, had all fled into their own quarters, where they huddled inactive with terror.

"We will re-actuate Migul," Tugh persuaded, "and find out from him what he did to Harl. I still do not think he murdered Harl.... It might mean saving Harl's life, Tina. Believe me, I can make that mechanism talk, and talk the truth!"

They reached the main lower corridor. In the distance they saw Alent still at his post by the little electrified gate guarding the tunnel to the Robot laboratory.

"We will go to the Power House," Tina suddenly decided: "you may be right, Tugh.... Come, it is this way. Stay close to me, Larry."

They pa.s.sed along the dim, silent tunnel; pa.s.sed Harl's room, where its light was still burning. Larry and Tina were in front, with the black-cloaked figure of Tugh stumping after them with his awkward gait.

Larry abruptly stopped. "Let Tugh walk in front," he said.

Tugh came up to them. "What is that you said?"

"You walk in front."

It was a different tone from any Larry had previously used.

"I do not know the way," said Tugh. "How can--"

"Never mind that; walk ahead. We'll follow. Tina will direct you."

It was too dark for Larry to see Tugh's face, but the cripple's voice was sardonic.

"You give me orders?"

"Yes--it just happens that from now on I do. If you want to go with us to the Power House, you walk in front."

Tugh started off with Larry close after him. Larry whispered to the girl:

"Don't let's be fools, Tina. Keep him ahead of us."

The tunnel steadily dwindled in size until Larry could barely stand up in it. Then it opened to a circular cave, which held one small light and had apparently no other exit. The cave had years before been a mechanism room for the palace temperature controls, but now it was abandoned. The old machinery stood about in a litter.

"In here?" said Tugh. "Which way next?"

Across the cave, on the rough blank wall, Tina located a hidden switch. A segment of the wall slid aside, disclosing a narrow, vaulted tunnel leading downward.

"You first, Tugh," said Larry. "Is it dark, Tina? We have no handlights."

"I can light it," came the answer.

The door panel swung closed after them. Tina pressed another switch. A row of tiny hooded lights at twenty-foot intervals dimly illumined the descending pa.s.sage.

They walked a mile or more through the little tunnel. The air was fetid; stale and dank. To Larry it seemed an interminable trip. The narrow pa.s.sage descended at a constant slope, until Larry estimated that they were well below the depth of the river bed. Within half a mile--before they got under the river--the pa.s.sage leveled off. It had been fairly straight, but now it became tortuous--a meandering subterranean lane. Other similar tunnels crossed it, branched from it or joined it. Soon, to Larry, it was a labyrinth of pa.s.sages--a network, here underground. In previous centuries this had been well below the lowest cellar of the mammoth city; these tube-like pa.s.sages were the city's arteries, the conduits for wires and pipes.

It was an underground maze. At each intersection the row of hidden hooded lights terminated, and darkness and several branching trails always lay ahead. But Tina, with a memorized key of the route, always found a new switch to light another short segment of the proper tunnel. It was an eery trip, with the bent, misshapen black-cloaked figure of Tugh stumping ahead, waiting where the lights ended for Tina to lead them further.

Larry had long since lost his sense of direction, but presently Tina told him that they were beneath the river. The tunnel widened a little.

"We are under the base of the dam," said Tina. Her voice echoed with a sepulchral blur. Ahead, the tramping figure of Tugh seemed a black gnome with a fantastic, monstrous shadow swaying on the tunnel wall and roof.

Suddenly Tugh stopped. They found him at an arched door.

"Do we go in here, or keep on ahead?" he demanded.

The tunnel lights ended a short distance ahead.

"In here," said Tina. "There are stairs leading upward to the catwalk balcony corridor halfway up the dam. We are not far from the Power House now."

They then ascended interminable moldy stone steps spiraling upward in a circular shaft. The murmur of the dam's spillways had been faintly audible, but now it was louder, presently it became a roar.

"Which way, Tina? We seem to have reached the top."

"Turn left, Tugh."

They emerged upon a tiny transverse metal balcony which hung against the southern side of the dam. Overhead to the right towered a great wall of masonry. Beneath was an abyss down to the lower river level where the cascading jets from the overhead spillways arched out over the catwalk and landed far below in a white maelstrom of boiling, bubbling water.

The catwalk was wet with spray; lashed by wind currents.

"Is it far, Princess? Are those lights ahead at the Power House entrance?"

Tugh was shouting back over his shoulder; his words were caught by the roar of the falling water; whipped away by the lashing spray and tumultuous winds. There were lights a hundred feet ahead, marking an entrance to the Power House. The dark end of the structure showed like a great lump on the side of the dam.

Again Tugh stopped. In the white, blurred darkness Larry and Tina could barely see him.

"Princess, quickly! Come quickly!" he called, and his shout sounded agonized.

Whatever lack of perception Larry all this time had shown, the fog lifted completely from him now. As Tina started to run forward, Larry seized her.