"Can't we find something in the lab to shoot a dart?" As Smith tried to remember, Westervelt interrupted. "If you decide on that, I'm not volunteering, thank you. Did you ever see Mr. Lydman move in a hurry? Whoever tries it had better not miss with the first dart!" Smith said, "Harumph!" and Parrish looked uncomfortable. The assistant glanced momentarily at Beryl, but shook his head immediately. Westervelt followed his thinking. For one thing, Lydman was known to be devoted to his wife and two children; for another, who knew how badly Beryl might miss? "Now, if everyone will just keep calm," said Smith, "and we can keep Bob busy, we'll probably get along fine until they restore power. How long can it take, after all? They can't waste any time with a large part of a modern city like this cut off. It's unthinkable." "I suppose you're right," said Parrish. Smith turned to Beryl. "What I meant by asking your co-operation," he said, "is that we'll need to have someone with Mr. Lydman most of the time. Willie has been doing it until now, but we don't want it to look like deliberate surveillance." "But why?" asked Beryl. "I mean ... I see that it worries all of you that ... that he might find out. But what if he does?" "Possibly nothing," answered Smith. "On the other hand, Mr. Lydman was once imprisoned, in his space traveling days. He was held for a long time under very trying conditions; and the experience has left him with a problem. It is not _exactly_ claustrophobia...." He paused, as if to let Beryl recall other remarks about Lydman. Their general air of gravity seemed to impress her. "I'll be ... glad to help," she said reluctantly. "Fine!" said Smith. "Probably nothing will be necessary. Now, I think we had better go in and tell Si, so that everyone will be alerted to the situation." Westervelt caught the glance that passed between Parrish and Beryl. He was almost certain that each of them was mentally counting the people who had known before _they_ had been told. _That's what you get for being so busy in the dead files_, he thought. They trouped in behind Smith. Simonetta watched as if they had been a parade. Smith, with an occasional comment from Parrish, told her the story. "So that is the partial reason for staying late," he concluded, "although, of course, the case of Harris comes first." Westervelt had wandered over to a window. He adjusted the filter dial for maximum clarity and looked out.