That Affair Next Door (Version 2)
Author: first_name: Anna Katharine
last_name: Green
Language: English
Year: 1897

One evening, New York society doyenne looks out her window and sees a man and woman entering the mansion opposite hers. Ten minutes later, only the man emerges. Soon, murder's afoot, and Miss Butterworth joins Detective Par Excellence Ebenezer Gryce in sleuthing out the killer! (Summary by Mark Leder)