He was sure that he was not the cause of the abrupt silence. His passage through the canyon had not previously disturbed either birds or cicadas. Something was out there. An intruder of which the ordinary forest creatures clearly did not approve. He took a deep breath and held it again, straining to hear the slightest movement in the woods. This time he detected the rustle of brush, a snapping twig, the soft crunch of dry leaves-and the unnervingly peculiar, heavy, ragged breathing of something big.