He stirred the controls, moved them further, holding hard. The braking rockets shook the ship, coming through the bulkheads as a faint roar. The ground came up fast. Still the landscape fled by—fled past for seeming days.

Prochaska announced wonderingly. "We've cleared the back side. You're on the landing run, Skipper."

Crag nodded grimly, thinking it was going to be rough. Each second, each split second had to be considered. There was no margin for error. No second chance. He checked and re-checked his instruments, juggling speed against altitude.

Ninety-mile wide Ptolemaeus was coming around again—fast. He caught a glimpse through the floor port. It was a huge saucer, level at the bottom, rimmed by low cliffs which looked as though they had been carved from obsidian. The floor was split by irregular chasms, punctuated by sharp high pinnacles. It receded and Alphons rushed to meet them. The Aztec was dropping fast. Too fast? Crag looked worriedly at the radar altimeter and hit the braking rockets harder. Alphons passed more slowly. They fled south, a slim needle in the lunar skies.

"Arzachel...." He breathed the name almost reverently.

Prochaska glanced out the side port before hurriedly consulting the instruments. Thirty thousand feet! He glanced worriedly at Crag. The ground passed below them at a fantastic speed. They seemed to be dropping faster. The stark face of the planet hurtled to meet them.

"Fifteen thousand feet," Prochaska half-whispered. Crag nodded. "Twelve thousand ... ten ... eight...." The Chief continued to chant the altitude readings in a strained voice. Up until then the face of the moon had seemed to rush toward the Aztec. All at once it changed. Now it was the Aztec that rushed across the hostile land—rushing and dropping. "Three thousand ... two thousand...." They flashed high above a great cliff which fell away for some ten thousand feet. At its base began the plain of Arzachel.

Out of the corner of his eye Crag saw that Bandit was leading them. But higher ... much higher. Now it was needling into the purple-black—straight up. He gave a quick, automatic instrument check. The braking rockets were blasting hard. He switched one hand to the steering rockets.

Zero minute was coming up. Bandit was ahead, but higher. It could, he thought, be a photo finish. Suddenly he remembered his face plate and snapped it shut, opening the oxygen valve. The suit grew rigid on his body and hampered his arms. He cursed softly and looked sideways at Prochaska. He was having the same difficulty. Crag managed a quick over-the-shoulder glance at Larkwell and Nagel. Everything seemed okay.

He took a deep breath and applied full deceleration with the braking jets and simultaneously began manipulating the steering rockets. The ship vibrated from stem to stern. The forward port moved upward; the face of the moon swished past and disappeared. Bandit was lost to sight. The ship trembled, shuddered and gave a violent wrench. Crag was thrown forward.