All through the dry season—long, weary months among sun-withered vegetation—these animals frequent the margins of bush and desert; but when the rains of the Sudan set in they move out from the sheltered, fly-infested scrub on to the open plains, to enjoy a far-reaching freedom and the fresh winds of the boundless spaces. The Red-fronted Gazelle and Damas Gazelle are content with wandering at no great range beyond their permanent locality, but the White Oryx and Addax, which have strong nomadic instincts and ever move restlessly from place to place, wander right away north when driven from the bush. I have seen them in latitude 18°, and the footprints of Addax in the sand as far north as latitude 22°, while Tuaregs of Ahaggar report the same animal to be west of the mountains on latitude 25°. This is not altogether surprising in respect to the Addax, as a few are found south of Tunis and Algeria, but it may not always be realised that the main stock of the species originates in the bush-belt that pertains along latitude 16°, which forms the shores of the Sahara in the Western Sudan and, doubtless, it is the same line, away eastward, that is the chief habitat of the Addax in Kordofan in the Egyptian Sudan. [Illustration: A MORNING’S BAG DORCAS GAZELLE AND GUINEA-FOWL] Once clear of the bush, the species of big game that live in the Sahara throughout the year are very limited. Dorcas Gazelle is the principal animal, and may be found throughout the interior in small numbers; sometimes approachable, if the country is broken; sometimes excessively wild in the open wastes. Its protective sand-colour is remarkable, and, standing still, it is often passed over in scanning a landscape, though perhaps broadside on, in full view, and at no great distance. On occasions of the kind I have suddenly realised that I stood face to face with one of these beautiful creatures, and have ejaculated under my breath: “Good heavens, I must have been asleep not to have seen you before!” In addition to the above, one or two Damas Gazelle were seen in Aïr and in Ahaggar, feeding on the vegetation of sandy wadis, and a few rare Wart Hog in the former mountains. But there end the ungulate animals of the Sahara, excepting the king of them all, the Arui, or Barbary Sheep, which I will return to later. Of the lesser animals the chief of interest are: Jackals, Lynx, Wild Cats, Hyenas, Foxes, Fennecs, Ratel, Ground Squirrels, Gerbils, Spiny Mice, Jerboas, Porcupines, Gundis, Dassies, and Hares.