He did not believe that his faculties, attuned to the slightest alarm, had deceived him, and he had learned the patience of the Indian from the Iroquois themselves.

His eyes continually pierced the thickets for a hostile object moving there, and his ears were ready to notice the sound of a leaf should it fall.
He heard, or thought he heard after a while, a slight sliding motion, like that which a great serpent would make as it drew its glistening coils through leaves or grass.

But it was impossible for him to tell how near it was to him or from what point it came, and his blood became chill in his veins.

He was not afraid of a danger seen, but when it came intangible and invisible the boldest might shudder.
The noise, real or imaginary, ceased, and as he waited he became convinced that it was only his strained fancy.

A man might mistake the blood pounding in his ears or the beat of his own pulse for a sound without, and after another five minutes, taking the rifle from the hollow of his arm, he stood upright.