"Hi!" No answer. "Hi! Dyke!" The lad addressed did not turn his head, but walked straight on, with the dwarf karroo bushes crackling and snapping under his feet, while at each call he gave an angry kick out, sending the dry red sand flying. He was making for the kopje or head of bald granite which rose high out of the level plain-where, save in patches, there was hardly a tree to be seen-for amongst these piled-up masses of glittering stone, lay deep moist crevices in which were shade and trickling water, the great blessings of a dry and thirsty desert.