I can quite understand Mr. Harker's concern.
6 seconds sound clip from the Dracula (1931) movie soundboard.
You can hear this line at 00:41:58 in the Blu-ray version of the movie.
Quote context
[...]
- I had a frightful dream a few nights ago, and I don't seem to be able to get it out of my mind.
- I hope you haven't taken my stories too seriously.
- Stories?
- Yes.
- I can quite understand Mr. Harker's concern.
- I'm afraid it's quite serious.
- My dear, I'm sure Count Dracula will excuse you.
- You must go to your room as Professor Van Helsing suggests.
- Oh, but, really, Father, I'm feeling quite well.
- You had better do as your father advises.
[...]