"Okay," he said in a natural voice. "These walls are sound-proof. We can use our lights. We'll have to."
"What happened?" Paula's voice said. "You said we were in a jam, Carver. Well?"
"We'll talk as we go. Garth, you first. Paula, stay with me. Sampson, bring up the rear, will you?"
Garth obediently set out down the sloping tunnel, scarcely listening to Brown's explanation. There were side branches to the passage here and there. He had to use his memory, which seemed less accurate than he remembered. Once he almost blundered, but caught himself in time.
Brown said, "Garth, we've got thirty miles of tunnel and twenty more above ground till we hit the Forest. Right? This is rough going. We won't get out of here till daylight. So we'd better camp in the passage, at the other end, till tomorrow night."
"We don't have to do that," Garth grunted. "This isn't Earth. Jupiter won't rise for thirteen hours."
"The men have heavy packs." Brown shifted his own big one uncomfortably. "Fifty miles is quite a way. Still, the quicker we reach the Forest, the safer we'll be."
"There's a river." Garth's voice was doubtful. "We might use that."
"Would it help?"