That very night, trouble boarded the Friar Bacon. In a way, it was Larry Wolfe's fault.

Coming off duty eight hours after they left, he hurried to Ann Holland's stateroom near Carlyle's suite, eager to hear how she had enjoyed her first day aboard a space-liner.

He found her tired and curiously subdued.

"Excitement get you?" he asked her.

Ann's eyes flashed as she thought of the thousand new things she had seen. "A little, I guess," she admitted. "But, Larry, it's wonderful! Such a feeling of freedom, so many strange things to be seen. Here we are darting through space like a liner plowing the Atlantic!"

"You'll get over that pretty soon," Larry grinned. "Then you'll be like the rest of us space-sailors, cursing our luck that man can't push his darned ships along at the speed of light."

"I don't think I ever will," the girl mused. "They build these ships just like Swiss watches, don't they? Every beam and girder machined by hand, every nut and bolt a masterpiece. I went over the whole ship with Thad. I feel like an authority already!"

She laid her head against the cushioned back of the chair, glancing through drowsy eyes out the port-hole. With her face turned away from Larry's, she did not see the swift bolt of jealousy that shot through him.

"Thad?" he echoed. "That's funny, Ann. I've never been allowed to get that familiar with him myself. It's always 'Chief' or 'sir' to us crew members."

The girl's eyes widened a little; then she shrugged her slim shoulders. "I don't know how I happened to call him that. He seems to be a person so very likeable you can't be formal with him."