Door Into Summer

I looked. He had his finger on "Davis." There were columns of Davises. But where he had his finger there were a dozen "D. B. Davises"-from "Dabney" to "Duncan."

There were three "Daniel B. Davises." One of them was me.

"That's from less than seven million people," he pointed out. "Want to try your luck on more than two hundred and fifty million?"

"It doesn't prove anything," I said feebly.

"No," he agreed, "it doesn't. It would be quite a coincidence, I readily agree, if two engineers with such similar talents happened to be working on the same sort of thing at the same time and just happened to have the same last name and the same initials. By the laws of statistics we could probably approximate just how unlikely it is that it would happen. But people forget-especially those who ought to know better, such as yourself-that while the laws of statistics tell you how unlikely a particular coincidence is, they state just as firmly that coincidences do happen. This looks like one. I like that a lot better than I like the theory that my beer buddy has slipped his cams. Good beer buddies are hard to come by."

"What do you think I ought to do?"

"The first thing to do is not to waste your time and money on a psychiatrist until you try the second thing. The second thing is to find out the first name of this `D. B. Davis' who filed this patent. There will be some easy way to do that. Likely as not his first name will be `Dexter.' Or even `Dorothy.' But don't trip a breaker if it is `Daniel,' because the middle name might be `Berzowski' with a social-security number different from yours. And the third thing to do, which is really the first, is to forget it for now and order another round."

So we did, and talked of other things, particularly women. Chuck had a theory that women were closely related to machinery, but utterly unpredictable by logic. He drew graphs on the table top in beer to prove his thesis.

Sometime later I said suddenly, "If there were real time travel, I know what I would do."

"Huh? What are you talking about?"

"About my problem. Look, Chuck, I got here-got to `now' I mean-by a sort of half-baked, horse-and-buggy time travel. But the trouble is I can't go back. All the things that are worrying me happened thirty years ago. I'd go back and dig out the truth if there were such a thing as real time travel." He stared at me. "But there is."

"What?"

He suddenly sobered. "I shouldn't have said that."

I said, "Maybe not, but you already have said it. Now you'd better tell me what you mean before I empty this here stein over your head."

"Forget it, Dan. I made a slip."

"Talk!"

"That's just what I can't do." He glanced around. No one was near us. "It's classified."

"Time travel classified? Good God, why?"

"Hell, boy, didn't you ever work for the government? They'd classify sex if they could. There doesn't have to be a reason; it's just their policy. But it is classified and I'm bound by it. So lay off."

"But-Quit fooling around about it, Chuck; this is important to me. Terribly important." When he didn't answer and looked stubborn I said, "You can tell me. Shucks, I used to have a 'Q' clearance myself. Never suspended, either. It's just that I'm no longer with the government."

"What's a `Q' clearance?"

I explained and presently he nodded. "You mean an `Alpha' status. You must have been hot stuff, boy; I only rated a `Beta.'"

"Then why can't you tell me?"

"Huh? You know why. Regardless of your rated status, you don't have the necessary `Need to Know' qualification."

"The hell I don't! `Need to Know' is what I've got most of."

But he wouldn't budge, so finally I said in disgust, "I don't think there is such a thing. I think you just had a belch back up on you."

He stared at me solemnly for a while, then he said, "Danny."

"Huh?"

"I'm going to tell you. Just remember your `Alpha' status, boy. I'm going to tell you because it can't hurt anything and I want you to realize that it couldn't possibly be of use to you in your problem. It's time travel, all right, but it's not practical. You can't use it."

"Why not?"

"Give me a chance, will you? They never smoothed the bugs out of it and it's not even theoretically possible that they ever will. It's of no practical value whatsoever, even for research. It's a mere by-product of NullGrav-that's why they classified it."

"But, hell, NullGrav is declassified."

"What's that got to do with it? If this was commercial, too, maybe they'd unwrap it. But shut up."

I'm afraid I didn't, but I'd rather tell this as if I had. During Chuck's senior year at the University of Colorado-Boulder, that is-he had earned extra money as a lab assistant. They had a big cryogenics lab there and at first he had worked in that. But the school had a juicy defense contract concerned with the Edinburgh field theory and they had built a big new physics laboratory in the mountains out of town. Chuck was reassigned there to Professor Twitchell-Dr. Hubert Twitchell, the man who just missed the Nobel Prize and got nasty about it.