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 through it Tarzan passed unconcerned yet always alert. Now he swung lightly to the lower terraces of the overarching trees when some subtle sense warned him that Numa lay upon a kill directly in his path, or again he sprang lightly to one side as Buto, the rhinoceros, lumbered toward him along the narrow, deep-worn trail, for the ape-man, ready to fight upon necessity's slightest pretext, avoided unnecessary quarrels.

When he swung himself at last into the tree he sought, the moon was obscured by a heavy cloud, the tree tops were waving wildly in a steadily increasing wind whose soughing drowned the lesser noises of the jungle. Upward went Tarzan toward a sturdy crotch across which he long since had laid and secured a little platform of branches. It was very dark now, darker even than it had been before, for almost the entire sky was overcast by thick, black clouds.

Presently the man—beast paused, his sensitive nostrils dilating as he sniffed the air about him. Then, with the swiftness and agility of a cat, he leaped far outward upon a swaying branch, sprang upward through the darkness, caught another, swung himself upon it and then to one still higher. What could have so suddenly transformed his matter-of-fact ascent of the giant bole to the swift and wary action of his detour among the branches? You or I could have seen nothing—not even the little platform that an instant before had been just above him and which now was immediately below—but as