Page:Tarzan and the Jewels of Opar.djvu/188

Rh the fact of our sensitive noses; but, as a matter of fact, we cannot smell at all, our olfactory organs are practically atrophied, by comparison with the development of the sense among the beasts of the wild.

Where a foot is placed an effluvium remains for a considerable time. It is beyond the range of our sensibilities; but to a creature of the lower orders, especially to the hunters and the hunted, as interesting and ofttimes more lucid than is the printed page to us.

Nor was Tarzan dependent alone upon his sense of smell. Vision and hearing had been brought to a marvelous state of development by the necessities of his early life, where survival itself depended almost daily upon the exercise of the keenest vigilance and the constant use of all his faculties.

And so he followed the old trail of the Belgian through the forest and toward the north; but because of the age of the trail he was constrained to a far from rapid progress. The man he followed was two days ahead of him when Tarzan took up the pursuit, and each day he gained upon the ape-man. The latter, however, felt not the slightest doubt as to the outcome. Rh