It's a well-known fact that your uncle was drunk at the time.
4 seconds sound clip from the The Cocoanuts (1929) movie soundboard.
You can hear this line at 00:15:07.139 in the DVD version of the movie.
Quote context
[...]
- Oh, who cares about the Boston Yates?
- Anyway, Bob isn't a clerk. He's an architect. He's only clerking until he can get started.
- One who clerks, Polly, is a clerk, and that settles it.
- And I want you to remember that no Potter has ever been involved in a single scandal.
- It's a well-known fact that your uncle was drunk at the time.
- Say, any luck with the 4:30?
- Yes, it didn't hit me. That's the only luck I had with it.
- Mr. Hammer, I think I know what's wrong with the hotel.
- I think I know too. You're fired. Get your hat and my coat and get out.
- Maybe the season hasn't started yet.
- Maybe the hotel hasn't opened yet.
[...]