The Moonstone the best of modern English detective novels in a genre invented by Collins and not by Poe," and Dorothy L. Sayers praised it as "probably the very finest detective story ever written." In "The Victorian Age in Literature," G. K. Chesterton calls it "probably the best detective tale in the world." It was published in 1868, later than Poe's short story mysteries "The Murders in the Rue Morgue" (1841) (which introduced the famous locked-room paradigm), "The Mystery of Marie Rogêt" (1842), and "The Purloined Letter" (1845). The plot also shows some parallels with "The Hermitage" (1839), an earlier murder mystery
The Murders in the Rue Morgue one male and French, but disagreed on the language spoken by the other. The speech was unclear, and all witnesses claimed not to know the language they believed the second voice to be speaking. When a bank clerk named Adolphe Le Bon is arrested even though no evidence exists pointing to his guilt (other than his delivering the gold coins to the two ladies the day before), Dupin becomes intrigued and remembers a service that Le Bon once performed for him. He decides to offer his assistance to "G–", the prefect of police. Because none of the witnesses can agree