Past midnight, a visitor to Grand Canyon National Park sees two little boys play under the stars at a lookout before they vanish into thin air. Are they the tragic spirits of two brothers left in an unattended car that plunged into the canyon at that very spot? The famous mule Brightly passed away years ago, but many say on moonlit nights his ghostly form still walks the canyong's trails. Deep in the canyon, phantom drumming scares away rafters just trying to get a good night's sleep. Hikers see footsteps on a trail, scattering pebbles and raising small puffs of dust, but nothing else. An old dory drifts down the Colorado River, its wooden oars creaking in the night - is that the famous riverman Bert Loper, who disappeared on his final trip and whose mischievous ghost bedevils river runners today? In many buildings around the canyong rim, lights turn on when they should be off, spectral figures appear and disappear, and various things go bump in the night. Even the friendly ghosts of Harvery Girls still work at the canyon's shops and lodges, or so it seems. Book jacket.