There he let the pursuit end and returned thoughtfully to his room.
Dick was much troubled.

An ethical question had presented itself to him.
He believed that he had divined everything.

The solution had come to him with such suddenness and force that he was as fully convinced as if he had seen with his own eyes.

Military duty demanded that he invade the second floor of the Woodville house.

But there were feelings of humanity and mercy, moral issues not less powerful than military duty, and maybe more so.
He was pulled back and forth with great mental violence.