Partly inference, partly chance.
4 seconds sound clip from the The Mummy (1932) movie soundboard.
You can hear this line at 00:36:25.760 in the Blu-ray version of the movie.
Quote context
[...]
- Ardeth Bay introduced himself.
- Partly inference, partly chance.
- Sir Joseph, you seem disturbed.
- Yes. A tragedy at the museum after you left.
- When you were there, Miss Grosvenor?
- Yes. They told me I went there and tried to get in after it was closed. I don't remember, but...
[...]