When you are right up to it, turn sharply, grab the creature from his seat, open the desk, and lo - the musical box.
9 seconds sound clip from the Mr. Topaze (1961) movie soundboard.
You can hear this line at 00:26:56 in the Blu-ray version of the movie.
Quote context
[...]
- Is it because of my little musician you say that?
- You see, I rather like the tune. But unfortunately it completely destroys my authority.
- Yes, it's quite a good idea, but it's not completely fair, because it's based on deception.
- Well, is your little musician completely fair?
- No, but well, he's only a child.
- You do love these children, don't you?
- Oh, I wish I was dedicated as you are. I wish...
[...]