He was haunted by horrible dreams, and the thought of sleep was repugnant to him.

He would often drop asleep at odd hours over the campfire whilst his comrades were discussing and planning, and they would let him sleep in peace at such times; but at night he was alert and wide awake, and they were glad enough to give him his request, and let him keep watch whilst they rested and slumbered.
The silence of the snow-girt forest was profound; yet Charles was restless tonight, and kept pausing to listen with an odd intensity of expression.

His faculties, both of sight and hearing, had become preternaturally acute of late.

More than once this gift of his had saved the party from falling amongst a nest of hostile Indians; tonight it was to prove of service in another way.
In the dead of night the Rangers were awakened by a trumpet-like call.
"To arms, friends, to arms! The Indians are abroad; they are attacking our brothers! I hear the shouts of battle.

We must to their rescue! Let us not delay! To arms, and follow me; I will lead you thither!" In a second the camp was astir.