"Neither, really. We don't know what's wrong. Their minds suddenly ceased to function."

Hartson Brant leaned forward. "You mean they're unconscious?"

Steve shook his head. "Not in the usual sense. It's as though all their thoughts and memories had suddenly been scrambled. Did you ever see a teletype machine in operation, particularly one that suddenly went haywire?"

Rick had. "The news machine did that over at the Whiteside Morning Record. It was typing out clear copy, then suddenly there wasn't anything but gibberish."

"That's it," Steve agreed. "And it's the best analogy I can think of for what happened to the two scientists. When a teletype goes haywire, one moment everything is clear and perfect, the next everything is scrambled. All the letters are there but they no longer make words. The scientists talk words—common, everyday words—but the words don't make thoughts or sentences. Just sounds."

"How awful," Mrs. Brant murmured. Barby looked horrified.

Rick searched his memory for anything similar he had ever read about or heard of, but there was nothing. From the expressions on their faces, his father and Scotty were equally puzzled.

"Well, even though I have absolutely no evidence of foul play, I decided not to take chances," Steve went on. "I got one of the scientists to go along with my plan. He shares my concern, simply on the basis that no known disease would affect human beings in this way, and two scientists of the same team being stricken with an unknown ailment is too much coincidence."

"He's wise," Hartson Brant agreed.

"He also has a family. The other scientist does not. He's a crusty old bachelor who thinks the whole thing is nonsense and insists on staying right where he is."