The police have offered 2000 pounds for the first effective means.
4 seconds sound clip from the The Invisible Man (1933) movie soundboard.
You can hear this line at 00:56:59.133 in the Blu-ray version of the movie.
Quote context
[...]
- The Invisible Man has been reported in a hundred different places.
- Now, I appeal to you to help us keep the public calm.
- Can you tell us what plans you've got for capturing him?
- A hundred thousand men are searching and watching.
- Yes, I know. But have you any secret means of getting him?
- The police have offered 2000 pounds for the first effective means.
- The bloodhounds have lost the scent.
- Why not put wet tar on all the roads, then chase the black soles of his feet?
- Try and sleep now, my dear. There's nothing you can do.
[...]