Edgar Rice Burroughs: Tarzan of the Apes

Chapter 19: The Call of the Primitive (continued)

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. 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 tiny particle of the demolished larva, ofttimes not more than a speck of moisture.

Again, a minute bit of bark has been upturned by the scraping hand, and the direction of the break indicates the direction of the passage. Or some great limb, or the stem of the tree itself has been brushed by the hairy body, and a tiny shred of hair tells him by the direction from which it is wedged beneath the bark that he is on the right trail.

Nor does he need to check his speed to catch these seemingly faint records of the fleeing beast.

To Tarzan they stand out boldly against all the myriad other scars and bruises and signs upon the leafy way. But strongest of all is the scent, for Tarzan is pursuing up the wind, and his trained nostrils are as sensitive as a hound's.

There are those who believe that the lower orders are specially endowed by nature with better olfactory nerves than man, but it is merely a matter of development.