Sometimes our course led over tracts of sand--sand so light and powdery that the foot sank into it ankle-deep at every step. Occasionally we crossed high, abrupt ridges of black or chocolate-hued rock, separated from each other by gorges so deep that except at noontide, no sunbeam penetrated them. But usually our course lay across plains, infinite in extent. In the Summer season such were covered with heavy-headed shocks of "toa" grass,--yellow or light green in hue, according to the more or less scanty rainfall. But in Winter all the waving plumes crumbled away, leaving the bases of the tussocks as black as pitch. Where the hills and the plains met, stood groves of immense dragon aloes--some cumbered with nests of the sociable grossbeak--each as large as a hayrick. The lordly oryx crossed our path; the ungainly hartebeest lumbered away to windward at a pace which made pursuit hopeless; the gazelles of the desert fled before us like thistledown borne on an eddying wind. The roofs of many a city of desert mice sank beneath our footsteps and the horned adder hissed defiance at our caravan from his home at the tussock's base. We crossed the zig-zag track made by the yellow cobra when prowling in the darkness. The plumed ostrich scudded away at our approach, the great bustard of the Kalihari spread his powerful wings and flew forth heavily until he almost crossed the horizon, and the "kapok vogeltje," no bigger than a wren, twittered at us from his seat of cunning on the outside of the simulated snowball which is his nest. We did not fear the poisoned arrows of the Bushmen, for that strange race which formerly occupied the scenes of our wanderings had long since disappeared from the face of the earth. Within the wide bounds of that tract to which the Bushman gave his name, there existed but two individuals of his race,--an old, withered, toothless man, and a bent and ancient crone. These wraiths, who subsisted on roots, reptiles and insects, still haunted the mountains near Dabienoras, and levied a kind of toll on the very occasional traveller. This took the form of a trifling contribution of tobacco and sugar. CHAPTER TWO. ANDRIES ESTERHUIZEN--SILVERFONTEIN--THE KOEKER-BOOM--GAMOEP-- SAND-GROUSE--OUR HORSES--KANXAS--NIGHT IN THE DESERT--DAWN--HEAT--THE MIRAGE--BANTOM BERG--THE DUNE-MONSTER--THE FLIGHT OF THE OXEN.