And as quietly Cliff obeyed. She caught the small weapon out of the air with a steady hand—caught and leveled it.

“Stay just where you are!” she warned. “Back, Bat, bring it back!”

With a last throat-splitting screech of rage and hate, Bat twisted to safety between her boots. She pressed with thumb and forefinger, firing at the spacealls. The material turned to powdery flakes of ash—except for certain bits which still flapped from the scorched seat—as if something had protected them from the force of the blast. Bat sprang straight up in the air with a scream that tore their ears.

“What…?” began Cliff again.

Steena made a warning motion with her left hand. “Wait!

She was still tense, still watching Bat. The cat dashed madly around the cabin twice, running crazily with white-ringed eyes and flecks of foam on his muzzle. Then he stopped abruptly in the doorway, stopped and looked back over his shoulder for a long silent moment. He sniffed delicately.

Steena and Cliff could smell it too now, a thick oily stench which was not the usual odor left by an exploding blaster-shell.

Bat came back, treading daintily across the carpet, almost on the tips of his paws. He raised his head as he passed Steena and then he went confidently beyond to sniff, to sniff and spit twice at the unburned strips of the spaceall. Having thus paid his respects to the late enemy he sat down calmly and set to washing his fur with deliberation. Steena sighed once and dropped into the navigator’s seat.

“Maybe now you’ll tell me what in the hell’s happened?” Cliff exploded as he took the blaster out of her hand.

“Gray,” she said dazedly, “it must have been gray—or I couldn’t have seen it like that. I’m colorblind, you see. I can see only shades of gray—my whole world is gray. Like Bat’s—his world is gray too—all gray. But he’s been compensated for he can see above and below our range of color vibrations and—apparently—so can I!”