- Inspector Holloway: Miss Savile, the medicine you gave your father contained prussic acid.
- Dr. Glyn: Hydrocyanic acid, cyanide. I haven't heard the term prussic acid used in years!
- Louise Saville: Oh, Dr. Glyn, this is Donald Loftis.
- Dr. Glyn: Pleased to meet you.
- Louise Saville: Donald's a medical student...
- Dr. Glyn: Oh, yes. Hmm... Well, after twenty years as a physician, may I offer you some advice?
- Donald Loftis: Yes, please do!
- Dr. Glyn: Take up plumbing.
- Inspector Holloway: There's just one other thing. It's quite possible that all of you, later on, will have to make a formal statement.
- Donald Loftis: But what for? You know where we were at 8 o'clock!
- Inspector Holloway: That's true. Unfortunately, 8 o'clock was the time when Klermer's body was discovered. The medical report shows that the time of death was around seven.
- Louise Saville: I can't leave him now. You do understand, don't you?
- Donald Loftis: Of course, he's a sick man. He needs you. That's what he's been telling you, isn't it? He's playing on your sympathies; he's using his illness as an excuse to keep you there. He's a selfish man.
- Louise Saville: Don, you have no right to say such things. He is my father!
- Donald Loftis: That's just the point: he's your father, he's not your lover!
- [Louise storms out of restaurant]