I believe it's some tale Miss Leece has made up.

And besides, why shouldn't she have come back to the building?
Perhaps she forgot a book or something.

I'd just like to know what Miss Leece was doing here at that time of day." "She came here to meet me on business," answered Miss Thompson.

"That is why she knows something of the unfortunate affair.

She was with me when I found my desk had been broken open and the papers disturbed.