After a while the southern horizon was again broken by the elevation of a mountain, which proved to be the Defafang, an extinct volcano, 1000 feet high, several miles from the river. Werne, one of the first explorers of the Upper Nile waters, the only European who visited this locality, collected a variety of specimens of the rocks, and they exhibited the volcanic nature of the basaltic lava, corresponding to similar formations in the Eifel. This mountain stands as the boundary-mark between the first negro territory on the White Nile and the shepherd race of the Baggara. As we were sailing in deep water close to the reedy shore, the roar and rustle of our great sail started up a herd of wild buffaloes, which disappeared from sight, before we had time to seize our rifles. When presently we were passing the last camp of the Baggara, our attention was attracted to a scene of excitement, at once vivid and picturesque. The entire population, alarmed by an attack of wild buffaloes on some cattle-drivers, was up and in hot pursuit. Hundreds of men armed with lance or sword, some of them mounted, were furiously hurrying to the scene, urged on by the frantic shrieks of the excited women. We could not resist the conclusion that the buffaloes, which we had disturbed, had proceeded to attack the neighbouring drivers. An impression seemed to prevail that we had fired at the Baggara, but in the tumult nobody exactly understood the circumstances. The gale was in our favour, and we glided rapidly out of reach without learning the precise issue of the disorder. We observed one poor fellow who had incurred a disaster similar to, and perhaps worse than, that which happened to my own Mohammed Amin. About Mohammed I may here mention that his upper lip had been held together by a couple of insect-needles; that he had been treated to plenty of pap and camomile-tea, and that after spitting out one little splinter of bone after another, he soon found himself getting all right again. In the course of the afternoon the boat sailed for a wager with a flotilla of light-grey pelicans. Repeated small shot could not make them rise; but at last we outstripped them, and succeeded in shooting down several from the group. From the supple breast-feathers of this bird, the savages of the Upper Nile prepare close perukes, which make an excellent imitation of a luxuriant crop of grey hair, and would be a valuable acquisition to any theatrical wardrobe. [Sidenote: MOHAMMED KHER.] A hurried trip upon the left bank brought me upon the track of a large herd of elephants. According to the Baggara, this district is most prolific as a hunting-ground for these animals. The adjacent territories of the Shillooks, on the other hand, are too densely populated to allow elephants to be numerous, and they have to be sought at some distance, where on account of the wide water-level, they are often reached in boats.