Well, he knew what was in there.
2 seconds sound clip from Longstreet (1971) - Wednesday's Child sitcom.
You can hear this line at 00:10:00.810 in the Blu-ray version of the TV Series.
Quote context
[...]
- Wait a minute, wait a minute. Slight indentation here.
- Is there a chance the cabinet maker could have discovered the false bottom?
- If he found anything, he would have told me.
- Well, he knew what was in there.
- Suppose the man who has Nikki calls now.
- You don't like this, do you?
- All right, it's your turn, missus.
[...]