Complex sentence: Once the policeman has left, Wolfe questions Fox concerning the stolen money and the murder; satisfied as to her honesty and innocence on both matters, he accepts her as his client, and persuades her to remain in the brownstone.
Split into simpler sentences: Once the policeman has left, Wolfe questions Fox concerning the stolen money and the murder. Satisfied as to her honesty and innocence on both matters, he accepts her as his client, and persuades her to remain in the brownstone.