The Disappearance of Mr. Davenheim

In Agatha Christie's short story, "The Disappearance of Mr. Davenheim," to win a bet with Inspector Japp, Poirot solves the mysterious robbery and disappearance of a banker from his home, all without leaving his seat. Is the culprit the businessman Mr. Davenheim was supposed to meet? Or is the situation more complicated? This short story originally appeared in the March 28, 1923 issue of The Sketch magazine.