Sharman wrote that the basic diet of these creatures is sulfur, raw sulfur.
3 seconds sound clip from the 20 Million Miles to Earth (1957) movie soundboard.
You can hear this line at 00:47:02.096 in the Blu-ray version of the movie.
Quote context
[...]
- I guess I've been pretty inconsiderate and self-centered. You've had a lot on your mind.
- With a candle burning on the table?
- Sharman wrote that the basic diet of these creatures is sulfur, raw sulfur.
- There are rich sulfur beds in Sicily, not many kilometers from here at the base of mount Etna.
- We'll scour that mountain area as soon as it's light. If the creature's there, we'll recapture it.
[...]