We find this in dead guard's hand. Probably thief try to steal it. Guard take it away, thief kill him.
7 seconds sound clip from the The Mummy (1932) movie soundboard.
You can hear this line at 00:30:00.960 in the Blu-ray version of the movie.
Quote context
[...]
- Imhotep?
- What was this Ardeth doing in the museum?
- Looking at the mummy, just at closing time.
- Hello. What? Il est mort? Tout de suite, effendi.
- Come. A museum guard found dead in the room of the princess.
- The cause of death, I not find nothing.
- Looks like an attempted theft, but nothing stolen here could be disposed of.
- Let me put this here. You'll be more comfortable.
- Thanks.
[...]