e brought up his right hand, balled his fingers into a
fist. And just as deliberately he struck home, square on the point of
that defenseless chin. Hume sagged, would have slipped down the
surface of the rock had Vye's hands not caught in his armpits.

Since he had not the strength left to get to his feet with such a
burden, Vye crawled, dragging the inert body of the Hunter with him.
And this time, as he had hoped, there was no resistance at the gap.
Unconscious, Hume was able to cross the barrier. Vye stretched him as
comfortably flat as he could, used a portion of their water on his
face until he moaned, muttered, and raised his hand feebly to his
head.

Then those gray eyes opened, focussed on Vye.

"What--"

"We're both through now, both of us!" The younger man saw Hume glance
around him with waking belief.

"But how--?"

"I knocked you out, that's how," Vye returned.

"Knocked me out? I crossed when I was unconscious!" Hume's voice
steadied, strengthened. "Let me see!" He rolled over on his side,
threw out his arm, and this time the hand found no wall. For him, too,
the barrier was gone.

"Once through, you are free," he added wonderingly. "Maybe they never
foresaw any escapes." He struggled up, sitting with his hands hanging
loosely between his knees.

Vye turned his head, looked down the trail. The length of distance
lying between them and the safari camp now faced them with a new
problem. Neither of them could make that trek on foot.

"We're out, but we aren't back--yet," Hume echoed his thought.

"I was wondering, if _this_ door is open--" Vye began.

"The flitter!" Again Hume's mind matched his. "Yes, if those globes
aren't hanging around just waiting for us to try."

"They might act only to get us here, not to keep us once we're in."
That might be wishful thinking, they wouldn't know until they tried to
prove it.

"Give me a hand." Hume held out his own, let Vye pull him to his feet.
Weak as he was, he was clear-eyed, plainly clear-headed once more.
"Let's go!"

Together they went back through the gap, then tested the absence of
the barrier once more, to make sure. Hume laughed. "At least the front
door remains open, even if we find the back one closed."

Vye left him sitting by that entrance while he made a quick trip to
the cave to pick up the small pack of supplies left them. When he
returned they crammed tablets into their mouths, drank feverishly of
the lake water, and, with the st