To comfort him I could only exclaim, "Well done, Mahomet! thrash him; pommel him well; punch his head; you know him best; he deserves it; don't spare him!" This advice, acting upon the natural perversity of his disposition, generally soothed him, and he ceased punching his head. This man was entirely out of his place, if not out of his mind, at certain moments, and having upon one occasion smashed a basin by throwing it in the face of the cook, and upon another occasion narrowly escaped homicide by throwing an axe at a man's head, which missed by an inch, he became a notorious character in the little expedition. We left Berber in the evening, and about two hours after sunset of the following day reached the junction of the Nile and Atbara. The latter presented a curious appearance. In no place was it less than four hundred yards in width, and in many places much wider. The banks were from twenty-five to thirty feet deep, and had evidently been overflowed during floods; but now the river bed was dry sand, so glaring that the sun's reflection was almost intolerable. The only shade was afforded by the evergreen dome palms; nevertheless the Arabs occupied the banks at intervals of three or four miles, wherever a pool of water in some deep bend of the dried river's bed offered an attraction. In such places were Arab villages or camps, of the usual mat tents formed of the dome-palm leaves. Many pools were of considerable size and of great depth. In flood-time a tremendous torrent sweeps down the course of the Atbara, and the sudden bends of the river are hollowed out by the force of the stream to a depth of twenty or thirty feet below the level of the bed. Accordingly these holes become reservoirs of water when the river is otherwise exhausted. In such asylums all the usual inhabitants of this large river are crowded together in a comparatively narrow space. Although these pools vary in size, from only a few hundred yards to a mile in length, they are positively full of life; huge fish, crocodiles of immense size, turtles, and occasionally hippopotami, consort together in close and unwished-for proximity. The animals of the desert--gazelles, hyenas, and wild asses--are compelled to resort to these crowded drinking-places, occupied by the flocks of the Arabs equally with the timid beasts of the chase. The birds that during the cooler months would wander free throughout the country are now collected in vast numbers along the margin of the exhausted river; innumerable doves, varying in species, throng the trees and seek the shade of the dome-palms; thousands of desert grouse arrive morning and evening to drink and to depart; while birds in multitudes, of lovely plumage, escape from the burning desert and colonize the poor but welcome bushes that fringe the Atbara River.