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—"

Down and down went the Sunsprite through the maze of meteor-moons, twisting, turning, dropping ever lower toward the green asteroid.

A last gasping shout from Holk Or, and the door crashed off its burned-through hinges. Kenniston, unable to turn from the life-or-death business of threading the swarm, heard the Jovian fighting furiously.

Next moment a hand gripped Kenniston's shoulder and tore him away from the controls. It was Murdock, his eyes blazing, his gun raised.

"Raise your hands or I'll kill you, Kenniston!" he cried.