- Harriet Vane: If anybody does marry you, Peter, it will be for the pleasure of hearing you talk piffle.
- Harriet Vane: Peter, people have been wrongly condemned before now.
- Lord Peter Wimsey: Only because I wasn't there.
- Harriet Vane: Oh, I never thought of that.
- Bill Rumm: We all are like sheep who have gone astray, and well I may say so, for I was a dark and wicked sinner myself, until this here gentleman laid his hand upon me as I was a-bustin' of his safe, and became God's instrument for turning me away from the path that leadeth to destruction.
- Lord Peter Wimsey: I don't suppose you have the faintest idea how to pick a lock, Miss Murchison?
- Miss Murchison: [Clearly shocked at the question] I'm... afraid... not - no idea whatsoever!
- Lord Peter Wimsey: [Shaking his head ruefully] I sometimes wonder what we went to school for.
- Harriet Vane: [as Peter walks in for a prison visitation] Can't help being a gentleman, can you?
- Lord Peter Wimsey: Afraid not... drilled in when I was too young to resist.
- Bunter: [to Peter] As you've so often said, my lord, when there's money, there's a motive for crime.
- Harriet Vane: You are bearing in mind, aren't you, that I've had a lover?
- Lord Peter Wimsey: Oh, yes, so've I. Several, in fact. It's the sort of thing that could happen to anyone. I can produce quite good testimonials. I'm told I make love rather nicely. Though I am at a bit of a disadvantage at the moment. One can't be too convincing at the other end of the table with a bloke looking in the window.
- Harriet Vane: I'll take your word for it.
- Sylvia Marriott: Sugar?
- Lord Peter Wimsey: No, thanks.
- Sylvia Marriott: I thought all men liked to make their coffee with syrup.
- Lord Peter Wimsey: I'm rather unusual. Haven't you noticed?
- Sylvia Marriott: I've not had time to observe you, but I'll take the coffee as a point in your favor.
- Chief Inspector Parker: [Reprovingly] Your vision is clouded because of her - Harriet Vane! Peter, can you tell me in all honesty that you're not allowing your judgement to be affected by your emotions?
- Lord Peter Wimsey: Yes, I can.