The Door Into Summer

He had had just enough drinks not to give a damn, not so many but what he was still steady. His capacity was pretty high. He lectured me on the mathematics of time theory and temporal displacement (he didn’t call it “time travel”), but he cautioned me not to take notes. It would not have helped if I had, as he would start a paragraph with, “It is therefore obvious-” and go on from there to matters which may have been obvious to him and God but to no one else.

When he slowed down I said, “I gathered from my friend that the one thing you had not been able to do was to calibrate it? That you could not tell the exact magnitude of the temporal displacement?”

“What? Poppycock! Young man, if you can’t measure it, it’s not science.” He bubbled for a bit, like a teakettle, then went on, “Here. I’ll show you.” He turned away and started making adjustments. All that showed of his equipment was what he called the “temporal locus stage”-just a low platform with a cage around it-and a control board which might have served for a steam plant or a low-pressure chamber. I’m fairly sure I could have studied out how to handle the controls had I been left alone to examine them, but I had been told sharply to stay away from them. I could see an eight-point Brown recorder, some extremely heavy-duty solenoid-actuated switches, and a dozen other equally familiar components, but it didn’t mean a thing without the circuit diagrams.

He turned back to me and demanded, “Have you any change in your pocket?”

I reached in and hauled out a handful. He glanced at it and selected two five-dollar pieces, mint new, the pretty green plastic hexagonals issued just that year. I could have wished that he had picked half fives, as I was running low.

“Do you have a knife?”

“Yes, sir.”

“Scratch your initials on each of them.”

I did so. He then had me place them side by side on the stage. “Note the exact time. I have set the displacement for exactly one week, plus or minus six seconds.”

I looked at my watch. Dr. Twitchell said, “Five . . four three. . . two. . . one. . . now.”

I looked up from my watch. The coins were gone. I didn’t have to pretend that my eyes bugged out. Chuck had told me about a similar demonstration-but seeing it was another matter.

Dr. Twitchell said briskly, “We will return here one week from tonight and wait for one of them to reappear. As for the other one-you saw both of them on the stage? You placed them there yourself?”

“Yes, sir.”

“Where was I?”

“At the control board, sir.” He had been a good fifteen feet from the nearest part of the cage around the stage and had not approached it since.

“Very well. Come here.” I did so and he reached into a pocket. “Here’s one of your bits. You’ll get the other back a week from now.” He handed me a green five-dollar coin; it had my initials on it.

I did not say anything because I can’t talk very well with my jaws sagging loosely. He went on, “Your remarks last week disturbed me. So I visited this place on Wednesday, something I have not done for-oh, more than a year. I found this coin on the stage, so I knew that it had been . . . would be . . . using the equipment again. It took me until tonight to decide to demonstrate it to you.”

I looked at the coin and felt it. “This was in your pocket when we came here tonight?”

“Certainly.”

“But how could it be both in your pocket and my pocket at the same time?”

“Good Lord, man, have you no eyes to see with? No brain to reason with? Can’t you absorb a simple fact simply because it lies outside your dull existence? You fetched it here in your pocket tonight-and we kicked into last week. You saw. A few days ago I found it here. I placed it in my pocket. I fetched it here tonight. The same coin . . . or, to be precise, a later segment of its space-time structure, a week more worn, a week more dulled-but what the canaille would call the `same’ coin. Although no more identical in fact than is a baby identical with the man the baby grows into. Older.”

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