- Philo Vance: Miss Greene, do you know anyone that would want to hurt your brother and sister?
- Sibella Greene: Oh, we'd all come under suspicion there. We all hate each other.
- Sibella Greene: [to Ada] You angelic little snake-in-the-grass! I wouldn't be surprised if you murdered Chester!
- Sgt. Ernest Heath: Yeah. Probably shot herself in the back, too.