It'll take a little time, but I'll find out about him eventually.
3 seconds sound clip from the The Mummy (1959) movie soundboard.
You can hear this line at 01:07:26.200 in the Blu-ray version of the movie.
Quote context
[...]
- This must tie up. It's too great a coincidence.
- If he's up to something, you'll be placing yourself in danger.
- It's my duty to warn you not to take any action yet.
- It'll take a little time, but I'll find out about him eventually.
- I am, but I shan't be far away.
- Now remember, Mr Banning, no private police work please.
- Great God, we have accomplished what we set out to do.
[...]