He turned silently on the other side, but, no matter how intently he studied the sitting figure of his comrade, he could not see it stir.

He did not know how long he had been awake, trying thus to decide a question that should be of no importance at such a time.

Although unable to sleep, he fell into a dreamy condition, and continued vaguely to watch the rigid and silent sentinel.
He suddenly saw Tom stir, and he came from his state of languor.

The exciting question was solved at last.

The man would not sit all night absolutely immovable.