Apart from his conversation, he had the seal to Ananka's tomb.

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

You can hear this line at 01:18:12.375 in the Blu-ray version of the movie.

Quote context

[...]

- Come, Kharis. This time you shall not fail.

- If he'd strangled you there and then, it would have served you right.

- Inspector, my father and his brother have both been killed. I had to do something.

- Anyway, I found out what you wanted.

- Are you sure it was him?

- I'm certain.

- Apart from his conversation, he had the seal to Ananka's tomb.

- What more do you want, Inspector? Surely...

- I'll tell you, Mrs Banning.

- Perhaps your husband is right. Perhaps this man is controlling the mummy. I'm inclined to think he is.

- But what you don't understand is he's been forced into a position where he has got to act and act soon. I didn't want to force any action until I was ready to deal with it.

- By that time it might have been too late.

- Couldn't we get more help?

- At the moment, the sergeant is trying to round up some of the villagers.

[...]