- Well, sir, to tell you the truth, when I was outside, I thought I heard you talking to someone.
- Of course you did. I was talking to myself.

7 seconds sound clip from the Horror of Dracula (1958) movie soundboard.

You can hear this line at 00:35:48.740 in the DVD version of the movie.

Quote context

[...]

- Memo. Check final arrangements with Harker before he leaves for Klausenburg.

- Three, the crucifix. Symbolizing the power of good over evil. The power of the crucifix in these cases...

- Come in.

- You rang, sir?

- Oh, yes.

- I want this letter delivered first thing in the morning.

- Will you see to that?

- Yes.

- Thank you.

- Thank you, sir.

- Anything the matter? What is it?

- Well, sir, to tell you the truth, when I was outside, I thought I heard you talking to someone.

- Of course you did. I was talking to myself.

- You won't forget that letter, will you?

- No, sir. Yes, sir.

- The power of the crucifix in these cases is two-fold. It protects the normal human being, but reveals the vampire or victim of this vile contagion when in advanced stages.

- Established that victims consciously detest being dominated by vampirism, but are unable to relinquish the practice, similar to addiction to drugs.

- Ultimately, death results from loss of blood. But, unlike normal death, no peace manifests itself for they enter into the fearful state of the undead.

[...]