Chancing thereafter upon a place at which the rocky walls were low and sloped gradually, he led the horses out, and before it grew dark they built a barricade for the night. Nell's tent stood on a high and dry spot close to a big white-ant hillock, which barred the access from one side and for that reason lessened the labor of building the zareba.
Near-by stood a large tree with widely spread boughs which, covered by dense foliage, furnished shelter against rain. In front of the zareba grew single clumps of trees and further a thick forest entangled with climbing plants, beyond which loftily shot out crowns of strange palm trees resembling gigantic fans or outspread peacock tails.
Stas learned from Kali that before the second rainy season, that is, in autumn, it was dangerous to pass the night under these palm trees, for the huge-fruit, at that time ripe, breaks off unexpectedly and falls from a considerable distance with such force that it can kill a person or even a horse. At present, however, the fruit was in bud, and in the distance before the sun set there could be seen, under the crowns, agile little monkeys, which, leaping gaily, chased each other.
Stas, with Kali, prepared a great supply of wood, sufficient for the whole night, and, as at times strong blasts of hot air broke out, they reinforced the zareba with pickets which the young negro whittled with Gebhr's sword and stuck in the ground. This precaution was not at all superfluous, as a powerful whirlwind could scatter the thorny boughs with which the zareba was constructed and facilitate an attack by beasts of prey.
However, immediately after sunset the wind ceased, and instead, the air became sultry and heavy. Through the rifts in the clouds the stars glittered here and there, but afterwards the night became so utterly dark that one could not see a step ahead. The little wanderers grouped about the fire, while their ears were assailed by the loud cries and shrieks of monkeys who in the adjacent forest created a veritable bedlam. This was accompanied by the whining of jackals and by various other voices in which could be recognized uneasiness and fright before something which under the cover of darkness threatened every living being in the wilderness.
Suddenly the voices subsided for in the dusky depths resounded the groans of a lion. The horses, which were pastured at some distance on the young jungle, began to approach the fire, starting up suddenly on their fettered fore legs, while the hair on Saba, who usually was so brave, bristled, and with tail curled under him, he nestled close to the people, evidently seeking their protection.
The groaning again resounded, as though it came from under the ground; deep, heavy, strained, as if the beast with difficulty drew it from its powerful lungs. It proceeded lowly over the ground, alternately increased and subsided, passing at times into a hollow, prodigiously mournful moan.
"Kali, throw fuel into the fire," commanded Stas.
The negro threw upon the camp-fire an armful of boughs so hastily that at first whole sheaves of sparks burst out, after which a high flame shot up.
"Stas, the lion will not attack us, will he?" whispered Nell, pulling the boy by the sleeve.