The Lonely House

This began as a pleasant tale of a German professor of the ripe age of sixty going to Ukraine to study the flora and fauna on a holiday, despite his friends' objections and better advice. He finds the Ukrainians to be quite friendly and is setting about his investigations into the local entomology when, in the second chapter...he finds a murder!
What follows is a very interesting murder mystery narrated by the professor. A very good story!
I have the Lippincott first edition of 1907, complete with a beautiful pictorial cover and three color illustrations.