You won't learn anything from them. They're only love letters. There are not many of them.
6 seconds sound clip from the The Third Man (1949) movie soundboard.
You can hear this line at 00:29:00.383 in the Blu-ray version of the movie.
Quote context
[...]
- That's all right, miss. Don't worry. We're used to it. Like doctors.
- There was a third man there. I suppose that doesn't sound peculiar to you.
- Tactful, too, aren't we, Callaghan?
- Must you take those letters?
- Yes, I'm afraid so. They're Harry's.
- You won't learn anything from them. They're only love letters. There are not many of them.
- They'll be returned to you, Miss Schmidt, as soon as they've been examined.
- Harry never did anything. Only a small thing once, out of kindness.
- You will have to come with us, Miss Schmidt.
[...]