Pastwatch- The Redemption Of Christopher Columbus - By Orson Scott Card Page 0,107

Hassan gripped his shoulders and murmured something to him, words from the Quran, and then kissed him on the lips.

Kemal climbed alone into his hemisphere. Hunahpu walked with Diko to hers, and just before she climbed the ladder he embraced her and kissed her gently. Tagiri did not hear the words that passed between them, but she knew -- they all knew, but did not speak of it -- that Hunahpu and Diko had also made a personal sacrifice, perhaps not as complete as that of Kemal, but one with its own kind of pain, its own sweet bitterness. It was possible that Kemal and Diko might see each other again, for they were both going to the island of Hispaniola -- no, the island of Haiti, for it was the native name for it that would survive now. But Hunahpu was going to the swamps of Chiapas in Mexico, and it was quite likely that either he or Diko would die during the long years before their paths could cross.

And that was assuming that all three hemispheres would arrive. The problem of simultaneity had never been overcome. Even though the wiring had been carefully measured so that it should take exactly as long for the signal to go from the switch to the three computers and from the computers to the three field generators, they knew that no amount of careful measurement could possibly make the signals arrive with true simultaneity. There would be some tiny but real difference in time. One of the signals would arrive first. One of the fields would exist, even if it was for just one nanosecond, before the others came into existence. And it was possible that because of the changes caused by the first field, the other fields would never come into being at all. The future in which they existed would have been obliterated.

Thus it was determined that each of the three must act as if the other two had already failed. Each must carry out the mission with as much care as if everything depended on him or her alone, for it very well might be true.

But they hoped that all three time machines would work, that all three travelers would reach their separate destinations. Diko would arrive in Haiti in 1488, Kemal in 1492; Hunahpu would reach Chiapas in 1475. "There is a certain sloppiness in nature," Manjam had told them. "True precision is never achieved, is never even possible, and so everything that happens depends on a certain amount of probability, has a little leeway, a bit of room to compensate for lapses and mistakes. Genetic molecules are filled with redundancy and can cope with a certain amount of loss or damage or extra insertions. Electrons moving through their quantum shells have a certain range of unpredictability about their exact location, for all that matters is that they remain at the same distance from the nucleus. Planets wobble in their orbits and yet persist for billions of years without falling into their motherstars. So there should be room for microseconds or milliseconds or centiseconds or even deciseconds of difference between the beginnings of the three fields. But we have no way of experimenting to see just what the tolerances are. We may have far exceeded them. We may have missed by a fraction of a nanosecond. We may have been so far from success as to have made this whole venture wasted time. Who can know these things?"

Why is it, thought Tagiri, that even though I know that within a few minutes I and my dear husband and my precious son Acho will almost certainly wink out of existence, it is Diko that I am grieving for? She is the one who will live. She is the one with the future. Yet the animal part of me, the part that feels emotion, does not comprehend my own death. It is not death, when the whole world dies with you. No, the animal part of me only knows that my child is leaving me, and that is what I grieve for.

She watched as Hunahpu helped Diko up the ladder, then walked to his own hemisphere and climbed.

And now it was Tagiri's own turn. She kissed and embraced Hassan and Acho, and then climbed her own ladder, up to the locked cage. She pressed the button to open it as Manjam and Hassan also pressed their widely separated buttons, as Diko and Hunahpu and Kemal pressed the buttons on their

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