"I didn't check," Dane confessed. "He was giving out and I had to get him to his bunk."

"It might be well to know." The Engineer-apprentice got up, his movements lacking much of the elastic spring which was normally his. When he climbed to control both the others followed him.

Ali's slender fingers played across a set of keys and in the small screen mounting on the computer a set of figures appeared. Dane took up the master course book, read the connotation and blinked.

"Not Luna?" Ali asked.

"No. But I don't understand. This must be for somewhere in the asteroid belt."

Ali's lips stretched into a pale caricature of a smile. "Good for the Old Man, he still had his wits about him, even after the bug bit him!"

"But why are we going to the asteroids?" Weeks asked reasonably enough. "There're Medics at Luna City—they can help us—"

"They can handle known diseases," Ali pointed out. "But what of the Code?"

Weeks dropped into the Com-tech's place as if some of the stiffening had vanished from his thin but sturdy legs. "They wouldn't do that—" he protested, but his eyes said that he knew that they might—they well might.

"Oh, no? Face the facts, man," Ali sounded almost savage. "We come from a frontier planet, we're a plague ship—"