Third brother.
2 seconds sound clip from the Dead Reckoning (1947) movie soundboard.
You can hear this line at 00:48:45.505 in the DVD version of the movie.
Quote context
[...]
- Third brother, quickly, quickly!
- Looks like I can't make it. You have to get the sutra to Tibet without me.
- You must not let them get the sutra. Promise me you won't...
- Brother! Brother! You'll be alright.
- Let's go. We can't waste time.
- Brother, put him down now. We'll take a rest.
- Third brother. Brother? Brother!
- No. We must get the book there. We mustn't turn back.
[...]