Urteil said, "Space, I'd like to give you one smash, just to plaster your big mouth over your miserable little face."

"You've got your chance. Is it a deal?"

"By Earth, it's a deal. I'll try not to kill you, but that's as far as I'll go. You've asked for this, you've begged for it."

"Right. Now let's go. Let's go." And Bigman was so anxious that he hopped about as he talked, sparring a little with rapid birdlike motions of his fists. In fact, such was his eagerness for this duel that not once did he give a specific thought to Lucky nor suffer any presentiment of disaster. He had no way of telling that, some time before, Lucky had fought a more deadly duel than the one Bigman now proposed.

The power-level had its tremendous generators and heavy equipment, but it also had its broad level space suitable for gatherings of personnel. It was the oldest part of the Dome. In the first days, before even a single mine shaft had been blasted into Mercurian soil, the original construction engineers had slept on cots in that space between the generators. Even now it was still occasionally used for trifilm entertainment.

Now it served as a ring, and Cook, together with half a dozen or so technicians, remained dubiously on the side lines.

"Is this all?" demanded Bigman.

Cook said, "Mindes and his men are out Sun-side. There are ten men in the mines looking for your ropes, and the rest are mostly at their instruments." He looked apprehensively at Urteil and said, "Are you sure you know what you're doing, Bigman?"

Urteil was stripped to the waist. He had a thick growth of hair over his chest and shoulders, and he moved his muscles with an athletic joy.

Bigman looked in Urteil's direction indifferently. "All set with the gravity?"

"We'll have it off at the signal. I've rigged the controls so the rest of the Dome won't be affected. Has Urteil agreed?"

"Sure." Bigman smiled. "It's all right, pal."

"I hope so," said Cook fervently.

Urteil called out, "When do we get started?" Then looking about the small group of spectators, he asked, "Anyone care to bet on the monkey?"

One of the technicians looked at Bigman with an uneasy grin. Bigman, now also stripped to his waist, looked surprisingly wiry, but the difference in size gave the match a grotesque appearance.

"No bet here," said the technician.

"Are we ready?" called Cook.

"I am," said Urteil.

Cook licked his pale lips and flicked the master switch. There was a change in the pitch of the subdued droning of the generators.

Bigman swayed with the sudden loss of weight. So did all the rest. Urteil stumbled but recovered rapidly and advanced gingerly into the middle of the clear space. He did not bother to lift his arms but stood waiting in a posture of complete relaxation.

"Start something, bug," he said.