Excerptyouth than any of the others. He was proud of Hendrik's gallant horsemanship, and his eyes followed him over the plain until the riders were nearly a mile off, and already mixing among the cattle.At this moment an object came under the eyes of Von Bloom, that at once arrested his attention. It was a curious appearance along the lower part of the sky, in the direction in which Hendrik and Swartboy had gone, but apparently beyond them. It resembled a dun-coloured mist or smoke, as if the plain at a great distance was on fire!Could that be so? Had some one fired the karoo bushes? Or was it a cloud of dust?The wind was hardly strong enough to raise such a dust, and yet it had that appearance. Was it caused by animals? Might it not be the dust raised by a great herd of antelopes,--a migration of the springboks, for instance? It extended for miles along the horizon, but Von Bloom knew that these creatures often travel in flocks of greater extent than miles. Still he could not think