Paul Simon sang: "The words of the prophets are written on the subway walls." If Sam Belyea was a folk singer, I would venture to say that he would pick up a guitar and sing: "The inner condition of the body and mind is revealed on the feet, hands, ears, and face." Just give him a melody, and voilà—the anthem of modern-day reflexology would be born. But, in lieu of a folk song, at least we have the wonderful vertical and horizontal zones to guide us in deciphering the rev