Beadle's New York Dime Library, No. 690

Museum Catalog Note This 1892 Beadle and Adams dime novel features "Thad Burr's Marvelous Case: A Romance of the Newburg Mystery" by Harold Payne, a detective story serialized across multiple chapters. Detective Thaddeus Burr is summoned from vacation by Inspector Byrnes to investigate the mysterious death of Morton Ainsworth. During his wedding ceremony in Newburg, Ainsworth suddenly collapses and dies when the minister asks for objections. A post-mortem reveals no poison, heart disease, or identifiable cause. Burr travels to Ainsworth's estate and interviews his niece Bettie Parkinson, who theorizes invisible poison administered days before death—drawing parallels to Indian doctor-assassins. She mentions that just before his death, Ainsworth received flowers from a child. Burr identifies a potential clue: a simple bouquet may have delivered the lethal dose. Meanwhile, the household's half-witted servant "The Owl" cryptically mentions a woman named "Sibyl" as connected to the murder. The narrative establishes the central mystery: how was Ainsworth killed, and who is Sibyl?