The road continuously but imperceptibly led upwards. On the rocky walls could be seen from time to time yellow traces of sulphur. The water in the clefts was saturated with its odor, which reminded both children unpleasantly of Omdurmân and the Mahdists, who smeared their heads with fat mixed with sulphur powder. In some places muskcats could be smelt; but there, where from high, overhanging rocks magnificent cascades of lianas fell to the bottom of the ravine, came an intoxicating scent of vanilla. The little wanderers willingly stopped in the shade of these tapestries embroidered with purple flowers and lilies, which with the leaves provided food for the horses.
Animals could not be seen; only from time to time on the crests of rocks monkeys squatted, resembling on the blue background those fantastic idols which in India adorn the borders of temples. Big males with long manes displayed their teeth at Saba or stretched out their jaws in sign of amazement and rage, and at the same time jumped about, blinking with their eyes and scratching their sides. But Saba, accustomed already to the sight of them, did not pay much heed to their menaces.
They rode briskly. Joy at recovering liberty drove away from Stas' breast that incubus which had throttled him during the night. His mind was now occupied with the thought of what was to be done farther; how to lead Nell and himself from a locality in which they were threatened by new captivity with the dervishes; what measures to adopt during the long journey through the wilderness in order not to die of hunger and thirst, and finally, whither to go? He knew already from Hatim that the Abyssinian boundary in a direct line from Fashoda was not more than five days' journey, and he calculated that this would be about one hundred English miles. Now from their departure from Fashoda almost two weeks had elapsed; so it was clear that they had not gone by the shortest route, but in seeking Smain must have turned considerably towards the south. He recollected that on the sixth day they crossed a river which was not the Nile, and that afterwards, before the country began to rise, they rode around great swamps. At school in Port Said, the geography of Africa was taught very thoroughly and in Stas' memory remained the name of Ballor, designating an expansion of the little-known river Sobat, a tributary of the Nile. He was not indeed certain whether they had passed that expansion, but assumed that they had. It occurred to him that Smain, desiring to capture slaves, could not seek for them directly west of Fashoda, as that country was already entirely depopulated by dervishes and small-pox; but that he would have to go to localities which heretofore were not visited by an expedition. Stas deduced from this that they were following Smain's trail, and the thought frightened him in the first moments.