Tommy looked deflated. He stepped back slightly, shaking his head. "Never saw such a resemblance. Are you a Vegan?"
"No," Bart lied flatly. "Aldebaran. David Briscoe."
"Glad to know you, Dave." With undiscourageable friendliness, Tommy stuck out a hand. "Say, that bell means dinner, why don't we go down together? I don't know a soul on the ship, and it looks like luck—running into a fellow who could be my best friend's twin brother."
Bart felt warmed and drawn, but sensibly he knew he could not keep up the pretense. Sooner or later, he'd give himself away, use some habitual phrase or gesture Tommy would recognize.
Should he take a chance—reveal himself to Tommy and ask him to keep quiet? No. This wasn't a game. One man was already dead. He didn't want Tommy to be next.
There was only one way out. He said coldly, "thank you, but I have other things to attend to. I intend to be very busy all through the voyage." He spun on his heel and walked away before he could see Tommy's eager, friendly smile turn hurt and defensive.
Back in his cabin, he gloomily dialed some synthetic jellies, thinking with annoyance of the anticipated good food of the dining room. He knew he couldn't risk meeting Tommy again, and drearily resigned himself to staying in his cabin. It looked like an awfully boring trip ahead.
It was. It was a week before the Lhari ship went into warp-drive, and all that time Bart stayed in his cabin, not daring to go to the observation Lounge or dining hall. He got tired of eating synthetics (oh, they were nourishing enough, but they were altogether uninteresting) and tired of listening to the tapes the room steward got him from the ship's library. By the time they had been in space a week, he was so bored with his own company that even the Mentorian medic was a welcome sight when he came in to prepare him for cold-sleep.
Bart had had the best education on Earth, but he didn't know precisely how the Lhari warp-drive worked. He'd been told that only a few of the Lhari understood it, just as the man who flew a copter didn't need to understand Newton's Three Laws of Motion in order to get himself back and forth to work.
But he knew this much; when the ship generated the frequencies which accelerated it beyond the speed of light, in effect the ship went into a sort of fourth dimension, and came out of it a good many light-years away. As far as Bart knew, no human being had ever survived warp-drive except in the suspended animation which they called cold-sleep. While the medic was professionally reassuring him and strapping him in his bunk, Bart wondered what humans would do with the Lhari star-drive if they had it. Well, he supposed they could use automation in their ships.