- It was never really established what made him crack, was it?
- Overwork and the excitement.
- That was the doctor's verdict.
- That's what it was. What else could it have been?

— Joseph Whemple (Raymond Huntley), John Banning (Peter Cushing)

10 seconds sound clip from the The Mummy (1959) movie soundboard.

You can hear this line at 00:32:08.583 in the Blu-ray version of the movie.

Quote context

[...]

- We had a good laugh about it afterwards.

- You were very fond of your father, weren't you?

- Yes. Yes, I was.

- In spite of that leg.

- That was my own fault. I could have gone back to base and had it set.

- Then all the trouble started. Do you remember that day?

- I don't think I shall ever forget it.

- That look on your father's face when he realised he'd discovered Ananka's tomb. And then afterwards.

- It was never really established what made him crack, was it?

- Overwork and the excitement.

- That was the doctor's verdict.

- That's what it was. What else could it have been?

- I can't get out of my mind what Father said to me the other day when I went to see him.

- All that nonsense about the living mummy and the Scroll of Life?

- Mmm-hmm.

- You'd better, otherwise you'll be having a breakdown too.

- What's that?

- The Ananka folio.

- Do you know the legend?

- Vaguely, yes. What about it?

- Do you know it?

- No, I don't really.

- Some wild story about the living dead. That sort of thing, wasn't it?

- And here it is.

[...]