A brook, which in July and August becomes swollen to a considerable stream, flowed past our quarters for the night, and joined the Tondy at the distance of a few leagues. To this rivulet, which has its source in the Madi country, in lat. 5° 10´ N., the Bongo give the name of the Doggoroo, whilst it is known as the Lehssy in the districts which divide the territories of the Bongo from the Niam-niam. Up the stream we followed its course for two hours, keeping along the edge of a pleasant park-like country, till we arrived at some thickets, which we had to penetrate in order to reach the banks of the stream. Sluggish here was the water’s pace; its breadth was about thirty feet, and it was sufficiently shallow to be waded through, scarcely rising above our hips; on our return in the following year the passage involved us in considerable difficulty. Beyond the Doggoroo the ground made a gradual but decided rise, and for more than forty miles the ascent was continuous. It was the first elevation of the ground of any importance which I had yet seen anywhere south of the Gazelle; for here was a broad offshoot of the southern highlands, which, according to the statements of the natives, serve as a watershed for the coalescing streams of the Tondy and the Dyau (Roah). After we had proceeded in a south-easterly direction till we had accomplished about a third of our journey to Sabby, the Seriba of Mohammed Aboo Sammat, we had at no great distance the territory of the Dinka upon our left. The adjacent clan is called the Goak, and a large number of the Bongo have taken refuge amongst them to escape the aggressions and stern oppression of the Nubians. The Dinka, for their part, impressed the strange intruders with such awe that, since Malzac (the well-known French adventurer, who for several years took up his quarters on the Rohl), no one has repeated the attempt to establish a settlement in their district. It is simply their wealth in cattle that is a temptation to occasional raids, which are studiously accomplished as far as possible without bloodshed. On the last stage between the Tondy and the Doggoroo we repeatedly came across the traces of elephants; but the trenches which had been designed to catch them had not as yet been a success. Elephants seem to prefer to make their way along the narrow paths which have been already trodden by the foot of man through the high grass, notwithstanding that they are not sufficiently broad to admit a quarter of their huge bodies.