Reith and Anacho jumped to their feet. Without difficulty they reached the wall and sprang through-away from the arid Sibol, out into the dim Tschai afternoon.

Down the broad white avenue they ran, then at Anacho's direction turned off to the north, toward the factories and the white Dirdirman spires, then to the waterfront, and across the causeway into Sivishe.

They halted to catch their breath. "Best that you go direct to the sky-car," said Reith. "Take it and leave. You won't be safe in Sivishe."

"Woudiver issued the information against me; he'll do the same for you," said Anacho.

"I can't leave Sivishe now, with the spaceship so near to completion. Woudiver and I must have an understanding."

"Never," said Anacho bleakly. "He is a great wad of malice."

"He can't betray the spaceship without endangering himself," argued Reith. "He is our accomplice; we work in his shed."

"He'd explain it away somehow."

"Perhaps, perhaps not. In any event, you must leave Sivishe. We'll share the money-then you must go. The sky-car is no more use to me."

Anacho's white face became mulish. "Not so fast, I am not the goal of a tsaugsh, remember this. Who will take the initiative to seek me out?"

Reith looked back toward the Glass Cage. "You don't think they'll seek you in Sivishe?"

"They are unpredictable. But I'm as safe in Sivishe as anywhere else. I can't go back to the Ancient Realm. They won't seek me at the shed unless Woudiver betrays the project."

"Woudiver must be controlled," said Reith.

Anacho only grunted. They set off once more, through the mean alleys of Sivishe.

The sun passed behind the spires of Hei and dimness seeped into the already shadowed streets. Reith and Anacho rode by public powerwagon to the shed.

Woudiver's office was dark; within the shed dim lights glimmered. The mechanics had gone home; there seemed to be no one on the premises ... In the shadows a figure moved. "Traz!" cried Reith.

The lad came forward. "I knew that you would come here, if you won free."

Neither the nomads nor the Dirdirmen were given to demonstration; Anacho and Traz merely took note of each other.

"Best that we leave this place," said Traz. "And quickly."

"I said to Anacho, I say to you: take the sky-car and go. There is no reason for you to risk another day in Sivishe."

"And what about you?"

"I must take my chances here."

"The chances are very small, what with Woudiver and his vindictiveness."

"I will control Woudiver."

"An impossibility!" Anacho cried out. "Who can control such perversity, so much monstrous passion? He is beyond reason."

Reith nodded somberly. "There is only one certain way, and it may be difficult."

"How do you intend this miracle?" Anacho demanded.

"I intend simply to take him at gunpoint, and bring him here. If he will not come, I will kill him. If he comes, he will be my captive, under constant guard.

I can think of nothing better."

Anacho grunted. "I would not object to guarding Big Yellow."

"The time to act is now," said Traz. "Before he knows of the escape."

"For you two, no!" Reith declared. "If I get killed ... too bad but unavoidable.

It is a risk I have to take. Not so for you. Take the skycar and money, leave now while you are able!"

"I remain," said Traz.

"And I as well," said Anacho.

Reith made a gesture of defeat. "Let's go after Woudiver."

CHAPTER EIGHTEEN

THE THREE STOOD in the dark court outside Woudiver's apartments, judging how best to open the postern. "We don't dare force the lock," muttered Anacho.

"Woudiver undoubtedly guards himself with alarms and death-traps."

"We'll have to go over the top," said Reith. "It shouldn't be too hard to reach the roof." He studied the wall, the cracked tile, a twisted old psilla. "Nothing to it." He pointed. "Up there, across to there-then there and over."

Anacho shook his head gloomily. "I'm surprised to find you still so innocent.

Why do you think the route appears so simple! Because Woudiver is convinced no one can climb? You'd find strings, traps and jangle-buttons every place you put your hand."

Reith chewed his lip in mortification. "Well, then, how do you propose we get in?"

"Not through here," said Anacho. "We must defeat Woudiver's craft with cleverness of our own."

Traz made a sudden motion, and drew the other two back into the deep shadows of an area-way.

Along the alley came a shuffle of footsteps. A tall thin shape limped past them and went to stand by the postern. Traz whispered: "Deine Zarre! He's in a bitter state."

Deine Zarre stood motionless; he brought forth a tool and worked on the lock.

The postern swung open; he walked through, his pace inexorable as doom. Reith sprang forward and held the gate ajar. Deine Zarre limped on unseeing. Traz and Anacho passed through the postern; Reith let the gate rest against the lock.

They now stood in a paved loggia, with a dimly lit passage leading to the main bulk of the house. "For the moment," said Reith, "you two wait here; let me confront Woudiver alone."

"You'll be in great danger," said Anacho. "It's obvious that you came for no good!"

"Not necessarily!" said Reith. "He will be suspicious, certainly. But he can't know that I've seen you. If he sees the three of us he'll be on his guard.

Alone, I have a better chance of outwitting him."

"Very well," said Anacho. "We'll wait here, for a certain period, at any rate.

Then we'll come in after you."

"Give me fifteen minutes." Reith set off down the passage, which opened into a courtyard. Across, in front of a brassbound door, stood Deine Zarre, plying his tool. Light suddenly flooded the courtyard. Deine Zarre had apparently tripped an alarm.

Into the courtyard stepped Artilo. "Zarre," he said.

Deine Zarre turned about.

"What do you do here?" Artilo asked in a gentle voice.

"It is no concern of yours," said Deine Zarre tonelessly. "Leave me be."

With an uncharacteristic flourish, Artilo brought forth a power-gun. "I have been so ordered. Prepare to die."

Reith stepped quickly forward, but the motion of Deine Zarre's eyes gave warning to Artilo; he started to look about. With two long strides, Reith was on him. He struck a terrible blow at the base of Artilo's skull, and Artilo collapsed dead.

Reith took up the power-gun, rolled Artilo to the side. Deine Zarre was already turning away, as if the circumstances held no interest.

Reith said, "Wait!"

Deine Zarre turned around once more. Reith came forward. Deine Zarre's gray eyes were astonishingly clear. Reith asked, "Why are you here?"

"To kill Woudiver. He has savaged my children." Deine Zarre's voice was calm and expository. "They are dead, both dead, and gone from this sad world Tschai."

Reith's voice sounded muffled and distant to his own ears.

"Woudiver must be destroyed ... but not until the ship is complete."

"He will never let you complete the ship."

"That is why I am here."

"What can you do?" Deine Zarre spoke contemptuously.

"I intend to take him captive, and keep him until the ship is finished. Then you may kill him."

"Very well," said Deine Zarre in a dull voice. "Why not? I will make him suffer."

"As you please. You go ahead, I will come close behind, as before. When we find Woudiver, upbraid him, but offer no violence. We don't want to drive him to desperate action."

Deine Zarre turned without a word. He worked open the door, to reveal a room furnished in scarlet and yellow. Deine Zarre entered, and after a quick look over his shoulder Reith followed. A dwarfish, dark-skinned servant in an enormous white turban stood startled.