Amazon.com description: Product Description: Considered the most important early American woman mystery writer, Rinehart is credited with perfecting the "had I but known" story line. This is her first published novel, a classic story involving a murdered man found in lower berth number ten of a Pullman sleeping car, a berth that the hero of this story was supposed to have occupied. Was the murdered man the intended victim or the narrator? And who among the three entirely different suspects was guilty of the crime?