THE SUN HAD just crested on the horizon like a misplaced planet, swollen and molten and red, lighting a landscape that seemed sculpted out of clay and soft stone and marked by the fossilized tracks of animals with no names, when a tall barefoot man wearing little more than rags dropped his horse's reins and eased himself off the horse's back and worked his way down an embankment into a riverbed chained with pools of water that glimmered as brightly as blood in the sunrise.