The indefinable sixth sense, developed in him by the wilderness, had taken alarm; there was a presence in the forest, foreign in its nature; it was not sight nor hearing nor yet smell that told him so, but a feeling or rather a sort of prescience.

Then an extraordinary thrill ran through him; it was an emotion partaking in its nature of joy and anticipation; he was about to be confronted by some danger, perhaps a crisis, and the physical faculties, handed down by a far-off ancestor, expanded to meet it.

He knew that he would conquer, and he felt already the glow of triumph.
Presently he sank down in the undergrowth so gently that not a bush rustled; there was no displacement of nature, the grass and the foliage were just as they had been, but the figure, visible before to the trained eye at a dozen paces, could not have been seen now at all.

Then he began to creep through the grass with a swift easy gliding motion like that of a serpent, moving at a speed remarkable in such a position and quite soundless.

He went a full half mile before he stopped and rose to his knees, and then his face was hidden by the bushes, although the eyes still searched every part of the forest.
His look was now wholly changed.