Or—an intriguing possibility—had Father, knowing the real Rigg had been murdered and the body hidden or destroyed, taken a perfectly ordinary baby and raised him so as to prepare him to pretend to be the Sessamekesh? If so, Father would certainly have gone to great lengths to make sure to use a baby who could be expected to grow up to resemble the Sessamoto family enough that he would be believable as their long-lost son and brother.
What Rigg couldn’t figure out was why Father would arrange things so that this plot would start even after he died. Why wouldn’t he want to be there to help guide Rigg through this perilous path?
Or had he already given him all the guidance he needed?
Rigg sat there trying to imagine what else Father had taught him that might be applicable in this situation. Nothing came to mind. Hard as it was to believe, it seemed likely that Father had not thought of everything.
But Father knew that no one could think of everything. So he must have believed he gave Rigg the tools he needed to deal with any situation, including this one. The problem was that Rigg had no idea what to do, so whatever training Father might have thought would be applicable would not be applied as long as Rigg remained as stupid as he was right now.
The door opened. It was not General Citizen who came in, but rather a very wet officer—apparently the one called Shouter. He was shoved into the cabin by other soldiers and immediately manacled to Rigg, wrist to wrist and ankle to ankle.
Only then did General Citizen come to the door and shout at the dripping, shivering man, “Maybe you can keep this one from diving overboard, you blithering fool! Maybe you won’t get thrown over yourself!”
Rigg immediately assumed that the shouting was so that the other soldiers on the boat would get the message; to Rigg, Citizen did not look genuinely angry at Shouter. The sincere glance of rage was directed at Rigg.
When the general was gone and he was alone with Shouter, it took a great deal of effort for Rigg to keep himself from laughing. Good old Loaf had not only gotten himself and Umbo off the boat, he had tossed the watchdog into the water as well. And General Citizen, whatever his real purpose might be, was not happy.
CHAPTER 11
Backward
This time it took eleven days for the computers to come up with their answer.
“Converting the energy requirement into mass,” said the expendable, “all the computers agree that without violating previously observed laws of physics, the most likely cost of returning from the fold to our previous position in spacetime, but with the direction reversed, would be about nineteen times the mass of this ship and everything on it.”
“Nineteen computers,” said Ram, “and nineteen times the mass.”
“Do you find this coincidence significant?” asked the expendable.
“Each computer was an observer and a meddler in spacetime at the time the fold was created,” said Ram. “You and I weren’t observers, because we could not sense or even understand the convolutions of the fields being generated. So for each observer, there had to be a distinct jump. And for each jump, there had to be an expenditure of mass equal to the total mass of the ship and its contents.”
“So if there had been only nine or ten computers,” said the expendable, “we would have come only halfway back to the present?”
“No,” said Ram. “I think if there had been only one computer, we would have crossed the fold only one-nineteenth as far into the past of the target star system before being shoved back, in reverse.”
“You seem to be very happy about this hypothesis,” said the expendable, “but I don’t see why. It still explains nothing.”
“Don’t you see?” said Ram. “Crossing the fold pushed us into the past a certain amount, based on the mass of the ship and its velocity or whatever. But the only way to pay for that passage across the fold was to send an equal mass backward. And because there were nineteen observers creating the fields that created the fold, it happened nineteen times.”
“But it happened only once,” said the expendable.
“No,” said Ram. “It happened nineteen times. For each jump, a copy of the ship was thrust backward in time. Eighteen other versions of ourselves occupy the identical space as the original ship, only moving the opposite direction through time as we journey toward Earth, all of us invisible to each other.”
“So our reliance on the computers caused the failure of the mission?” asked the expendable.
“The mission didn’t fail,” said Ram. “It succeeded nineteen times. We’re just the exhaust trail.”
• • •
Loaf was full of plans to sneak back into O and live there in hiding long enough for Umbo to deliver his messages. Only when Umbo finally convinced him that he had no idea how to do it did Loaf finally realize that learning how to go back in time might better be done somewhere else.
“I might not learn how to go back in time for weeks,” said Umbo as they walked through the woods, back toward O. “Or months.” If I ever do. “It was only Rigg who could go back in time. I helped, by slowing him down. Or speeding him up.”
“Which?”
“I always thought I was slowing other people down, but Rigg said I was really speeding them up so that everything around them seemed slower.”
Loaf grunted at that and moved a branch out of the way, holding it so it didn’t swing back and hit Umbo in the face.