He thinks they're wolves. Me, I've heard them howl at night before. He thinks they're talking to him. He howls and howls back at them. He's crazy!
14 seconds sound clip from the Dracula (1931) movie soundboard.
You can hear this line at 00:34:58 in the Blu-ray version of the movie.
Quote context
[...]
- My cries at night, they might disturb Miss Mina.
- Yes?
- They might give her bad dreams, Professor Van Helsing.
- Yes, it did. But I hardly think there are wolves so near London.
- I might have known. I might have known.
- We know why the wolves talk, do we not, Mr. Renfield? And we know how we can make them stop.
- You know too much to live, Van Helsing.
- We'll get no more out of him now for a while.
[...]