Simon nodded, miserably.
She said, "But _Simon_. Fifty thousand dollars bonus. If that story was
true, you should have gone back again to Munich. If there was one time
traveler, there might have been--"
"I keep telling you," Simon said bitterly, "I went back there three
times. There were hundreds of them. Probably thousands." He took a deep
breath. "Listen, we're just going to have to forget about it. They're
not going to stand for the space-time continuum track being altered. If
something comes up that looks like it might result in the track being
changed, they set you right back at the beginning and let things
start--for you--all over again. They just can't allow anything to come
back from the future and change the past."
"You mean," Betty was suddenly furious at him, "you've given up! Why
this is the biggest thing-- Why the fifty thousand dollars is nothing.
The future! Just think!"
Simon said wearily, "There's just one thing you can bring back with you
from the future, a hangover compounded of a gallon or so of Marzenbräu.
What's more you can pile one on top of the other, and another on top of
that!"
He shuddered. "If you think I'm going to take another crack at this
merry-go-round and pile a fourth hangover on the three I'm already
nursing, all at once, you can think again."