"Uh-huh."

"We're exactly where your room was. We haven't moved an inch."

"So where's my room? Where is it then?"

"It isn't. It was. Fifty thousand years ago it was, Eddie. Not now. Now it's gone, with the building, with the city, with your whole civilization. We've left your time and entered mine."

"Yeah," said Eddie. His voice sounded lame.

"You don't believe me."

"Nope, sorry—I don't." In truth Eddie was glad he hadn't married Judy but as for the rest of this, well—he was from Missouri.

"It's simple. I'm a professor of history and my period of study was yours, the second millennium of the Christian Era."

"Do you—ah—teach history in that outfit?" He pointed to the enticing lines of her halter and shorts.

"Certainly. It's comfortable. Anyway we use no guesswork in history. We use a time-scanner. That, of course, makes history the most accurate of all the sciences. It's mental travel through time—not physical unless you will it.