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 The scream that had brought Clayton and the two older men stumbling through the undergrowth had led Tarzan of the Apes straight to where Esmeralda lay, but it was not Esmeralda in whom his interest centered, though pausing over her he saw that she was unhurt.

For a moment he scrutinized the ground below and the trees above, until the ape that was in him by virtue of training and environment, combined with the intelligence that was his by right of birth, told his wondrous woodcraft the whole story as plainly as though he had seen the thing happen with his own eyes.

And then he was gone again into the swaying trees, following the high-flung spoor which no other human eye could have detected, much less translated.

At boughs' ends, where the anthropoid swings from one tree to another, there is most to mark the trail, but least to point the direction of the quarry, for there the pressure is downward always, toward the small end of the branch, whether the ape be leaving or entering a tree; but nearer the center of the tree, where the signs of passage are fainter, the direction is plainly marked.

Here, on this branch, a caterpillar has been crushed by the fugitive's great foot, and Tarzan knows instinctively where that same foot would touch in the next stride. Here he looks to find a [253]