Who knows into what hands similar documents may have fallen ?" "And the unknown man who worked in the chimney ?" put in the girl quietly.
"That simply proves what I say.

He knows that this treasure once existed, but not where.

Now, it is perfectly logical that some other man, years ago, might have discovered the same key as we have.

He may have got away with it.

The man might have plausibly declared that he had made the money somewhere.