R. Austin Freeman was an early 20th century British writer of detective stories. . Freeman first used the inverted detective plot in which the commission of the crime is described at the beginning, usually including the identity of the perpetrator, with the story then describing the detective's attempt to solve the mystery. Many of these stories include arcane scientific knowledge on such topics as tropical medicine, toxicology and metallurgy. The Red Thumb Mark, written in 1907 is the first of the Dr Throndkye novels. Dr Thorndyke was a medical/legal forensic investigator. The Uttermost Farthing, an unusual tale begins, "It is not without some misgivings that I at length make public the strange history communicated to me by my lamented friend Humphrey Challoner. The outlook of the narrator is so evidently abnormal, his ethical standards are so remote from those ordinarily current, that the chronicle of his life and actions may not only fail to secure the sympathy of the reader but may even excite a certain amount of moral repulsion. But by those who knew him, his generosity to the poor, and especially to those who struggled against undeserved misfortune, will be an ample set-off to his severity and even ferocity towards the enemies of society.