He drew himself up arrogantly. "Put down that gun, Fayette."

If anything, she held the gun more firmly, and moved it three inches

toward him.

"Don't mistake me, Ralph," she said, her eyes cold. "This is a yes and

no game. No maybes or ifs. If you say yes when the gun says no, that's

too bad. If you say no when the gun wants yes, _that's_ too bad. You

see how straightforward the three of us are?

"But I and my pet neutron gun will give you time to think.

"Tell me how you found X."

* * * * *

He slumped weakly against the bulkhead, wiping at his forehead with the

back of a shaking hand.

"There were enough clues," he said hoarsely.

And there had been, at that. _Tertium Organum_, A Key To The Enigmas Of

The World, _was_ a key. Its author, Ouspensky, looked at the universe

from a _different_ viewpoint.

The small _u_ in unterzuyder meant that it was to be taken as a common

noun.

And certainly the conclusion that the map was made 50,000 years ago was

itself an obvious clue!

"We made our calculations on the assumption that the map had been made

looking at the Solar System from the north--from the star Polaris,

that is. It hadn't been. My ancestors drew the map from the unorthodox

reference point of the Southern Cross.

"From the underside. I turned the negative upside down and made a new

map. Then I got right answers."

"Very good," said Fayette. "The tricky Unterzuyders did live up to

their name. _Didn't_ they, Ralph?"

"Yes," he said shakily.

X Marks the Asteroid · 第 6 / 7 题