Dyke had one other novelty to study--a novelty to him, for previously he had seen but little of them. This novelty was a party of baboons of all sizes, from the big, heavy males down to the young ones, which approached from some distance on the other side, clinging to their mothers' backs and necks. These strange, dog-like creatures came down from a high clump of rocks or kopje regularly every evening in the same way; and though they had been heard and seen frequently during the daytime, chattering, barking, and gambolling about, chasing one another in and out, and over the stones, as if thoroughly enjoying the sport, toward the time for their visit to the river all would be very silent, and in a cautious, watchful way a big old male, who seemed to be the captain or chief of the clan, would suddenly trot out on to a big block, and stand there carefully scanning the patch of forest and the plain beyond for danger. Then he would change to a nearer natural watch-tower, and have another long scrutiny, examining every spot likely to harbour an enemy, till, apparently satisfied, he would descend, go down to the river and drink, and then trot back to his lookout. After a few minutes' watch, he would then give a signal, a quick, short, barking sound, at which the rocks beyond, which the moment before had appeared to be deserted, suddenly became alive with baboons of all sizes, which came running down to the water in perfect confidence that all was well, and that their old chief high up on the rock would give them fair warning of the approach of any of their feline enemies, leopard or lion, with a taste for the semi-human kind. Upon one occasion Dyke suddenly started up, shouted, and fired his gun, for the sake of seeing what effect it would have. Instant flight he felt sure; but he was not prepared for all that followed. At the first sound there was a rush--a regular _sauve qui peut_; but there was a method in it. Mothers caught up their little ones, which fled to them for protection, and one big male made a kind of demonstration to cover the flight, while the old fellow on the rock sprang about, barking, shouting, and making little charges at the interrupter, not leaving his post till all had reached their sanctuary, when he followed to the kopje, and turned with others to stand, barking hoarsely, and picking up and throwing stones, with every sign of angry defiance, till their persecutor disappeared. Nine days had passed, and then the river began to shrink rapidly. Dyke hailed the change with eagerness, for he had been growing terribly anxious, and more and more convinced that something must be wrong, or Emson would have come down to the flooded ford; while at last his thoughts had taken a definite shape, one so full of horror, that he trembled for the task he had to perform--that of going home to put matters to the proof.