When Patch had kissed her good night outside her cabin and his footsteps had died away along the corridor, she crept out into the passage and made her way to hydroponics.

"Why, no," said the chief gardener, "we never carry clover of any sort. Why do you ask?"

On her way to the control room, Bridget tried not to think. She found the young officer from her table on duty with the captain, and the two men listened in surprise as she outlined her fears.

"I don't want to accuse Mr. Maguire of anything," she said. "I'm sure he doesn't realize how serious—and of course there may be nothing to it. It's just that I remember that shamrocks harbor the golden nematode—that is, in the soil around the roots. And it seems likely that if Mr. Maguire has live shamrocks—and I remember what a serious plague they once brought over from Ireland to America...."

The captain pulled his mustache. "It's clearly against regulations. I can't imagine how he'd get it past inspection. But then, Maguire's a very persistent man and he's got pull in odd places. I don't want to rouse the ire of the Irish, but I see your point."

"Couldn't you search his cabin—without his knowing I said to? Oh, I'm sure he'd be very angry. But if I could only look at his plants, then I'd be sure if they're safe. You must have ways of getting in—if there should be a short circuit or something in his cabin."

"Oh, we have ways," the captain said. "Don't we, Lieutenant?"

"Perhaps at breakfast," suggested the young officer. "If Miss Kelly could arrange to make it as leisurely as possible."

"And right afterward you might go to the lieutenant's cabin—with your instruments and without Mr. Maguire."