- Inspector James Bagshaw: Yes, I'm glad you can identify him, but you did enter the garden in an irregular fashion.
- Father Brown: Oh,yes, he did enter the garden in an irregular fashion. All the best people seem to get over garden walls these days. I believe you did yourself. I enterd the garden by the gate, and then entered through the house by the front door. I often enter houses that way.
- Inspector James Bagshaw: Why is it that people often presume that the private detective can do more than the professional?
- Father Brown: The mind of a man who could betray his country - that I should fully like to comprehend
- Sir Arthur Travers K.C.: [to sir Humphrey] You're like an opera inger who doesn't know when she's too old to sing "Carmen."