there? Does it really exist? All these years we thought it was just a story. But now—"

Groves walked over to the control board and sat down. He studied the dials intently. Carmichel sat down beside him.

"See this," Groves said, touching the big central meter with his finger. "The reading is up to liw, 100. Remember where it was when we started?"

"Of course. At nesi. At zero. Why?"

"Nesi is neutral position. Our starting position, back on Terra. We've gone the limit one way. Carmichel, Basset is right. We've got to find out. We can't go back to Terra without knowing if this really is.... You know."

"You want to throw it back all the way? Not stop at zero? Go on to the other end? To the other liw?"

Groves nodded.

"All right." The Commander let his breath out slowly. "I agree with you. I want to know, too. I have to know."

"Doctor Basset." Groves brought the Doctor over to the board. "We're not going back to Terra, not yet. The two of us want to go on."

"On?" Basset's face twitched. "You mean on beyond? To the other side?"

They nodded. There was silence. Outside the globe the pounding and ringing had ceased. The tower had almost reached the level of the port.

"We must know," Groves said.

"I'm for it," Basset said.

"Good," Carmichel said.

"I wish one of you would tell me what it is you're talking about," Siller said plaintively. "Can't you tell me?"

"Then here goes." Groves took hold of the switch. He held it for a moment, sitting silently. "Are we ready?"

"Ready," Basset said.

Groves threw the switch, all the way down.

Shapes, enormous and confused.

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