enniston's hands were flashing over the throttles. The Sunsprite was moving at reduced speed toward the meteor-enclosed asteroid. The cruiser shook to the bursting roar of power, as he opened up all the tail rockets. It plunged visibly faster toward the deadly swarm around Vesta, picking up speed by the minute. Rocking, creaking, quivering to the dangerous rate of acceleration Kenniston was maintaining, the little ship rushed ahead. But now there was loud hammering at the bridge-room door. "Open up or we'll burn that door down!" came Captain Walls' yell. Kenniston didn't turn. Hunched over the throttles, peering tensely ahead, he was tautly estimating speed and direction. His eyes searched frantically for the periodic break in the outer meteors. There was a muffled crackling and the smell of scorched metal flooded the bridge-room. A hoarse exclamation of pain came from Holk Or. "They got my arm through the door, damn them!" cursed the Jovian. "Hurry, Kenniston!" Kenniston was driving the Sunsprite full speed toward the whirling cloud of meteors around the asteroid. He had spotted the break in the cloud, the periodic opening caused by the gravitational influence of another nearby asteroid. It was not a real opening. It was merely a small area in the swarm where the rushing meteors were not so thick, and where a ship had a chance to worm through by careful piloting. Kenniston only remotely heard the struggle that Holk Or was putting up to hold the door against the hammering crowd outside. His mind was wholly intent on the desperately ticklish piloting at hand. He cut speed and eased the Sunsprite down into that thinner area of the meteor-swarm. Space around them now seemed buzzing with rushing, brilliant little moons. The meteorometers had gone crazy, blinking and buzzing unceasing warning, their needles bobbing all over the direction-dials. Instruments were useless here—he had to work by sight alone. He eased the cruiser lower through the swarm, his fingers flashing over the throttles, using quick bursts of the rockets to veer aside from the bright, rushing meteors. "Hurry!" yelled Holk Or hoarsely again, over the tumult. "I can't—hold them out much longer—"