You realise that I know all about the roadsweepers.

5 seconds sound clip from the Mr. Topaze (1961) movie soundboard.

You can hear this line at 01:04:57 in the Blu-ray version of the movie.

Quote context

[...]

- I assume that you're the one that's supplying roadsweepers to the city council. Am I right?

- Sir, the first lesson one learns in business is that discretion is essential.

- Especially for those kinds of deals.

- Perhaps, perhaps, who knows?

- I think you'll find your cigar will draw better if you pierce the end.

- Oh, yes.

- You realise that I know all about the roadsweepers.

- I even know someone who would be sitting in your chair if he'd been willing to work at a cut-price like you.

- Like me, at a cut-price?

- Oh! That's a good one. That is a good one.

- Just between ourselves, how much are you getting out of it?

[...]