I heard you talkin' about gettin' into the mine. Well, I know a way. It leads down to the shaft where the accident happened.
7 seconds sound clip from Superman (1948) - Depths Of The Earth (Chapter 2).
You can hear this line at 00:11:06.883 in the Blu-ray version of the episode.
Quote context
[...]
- You can contact Lois Lane and Jimmy Olsen there. They'll be the ones on the outside.
- Thanks.
- Hasn't the company got sense enough to realize that the whole world is interested in what happened?
- Sorry, but company's orders. No one allowed through but the rescue squad.
- Probably won't do any good, but I'm gonna try another angle.
- It won't do me any good if the place is guarded.
- Well, that's just it. It ain't.
- Of course, I figured that this ought to be worth a little something.
- This is it. You go straight through there until you find a vertical shaft.
- There's a ladder that leads down to where the miners were trapped.
[...]