AFTER THEIR SCANT MEAL of rockahominy, Sipar rolled himself into a ball and went to sleep immediately. Duncan sat with his back against a boulder which one day, long ago, had fallen from the slope above them, but was now half buried in the soil that through the ages had kept sifting down. Two days gone, he told himself. Was there, after all, some truth in the whispered tales that made the rounds back at the settlements—that no one should waste his time in tracking down a Cytha, since a Cytha was unkillable? Nonsense, he told himself. And yet the hunt had toughened, the trail become more difficult, the Cytha a much more cunning and elusive quarry. Where it had run from them the day before, now it fought to shake them off. And if it did that the second day, why had it not tried to throw