It will not be spoken of if mr. Hornblower is wise. He is not wise? It must be spoken of.
10 seconds sound clip from the The Skin Game (1931) movie soundboard.
You can hear this line at 00:42:21 in the Blu-ray version of the movie.
Quote context
[...]
- My friend over there is one of the agents, sir.
- Shocking. I'm sorry I heard it.
- Tell your friend to come here.
- Are you sure of what you said?
- I remember her quite well. Her name then was...
- I don't want to know, thank you. It's not to be spoken of.
- It will not be spoken of if mr. Hornblower is wise. He is not wise? It must be spoken of.
- I say no. I won't have it. To use a piece of knowledge about a woman? It's repugnant. I won't do it.
- If you had a son tricked into marrying such a woman, would you wish to remain ignorant of it?
- Quite. There's not a shadow of doubt. Not the faintest.
- Yes. I did. I don't like it. I don't like it at all.
[...]