 Poe 's sequel to " The Murders in the Rue Morgue " was " The Mystery of Marie Rogêt " , first serialized in December 1842 and January 1843 . Though subtitled " A Sequel to ' The Murders in the Rue Morgue ' " , " The Mystery of Marie Rogêt " shares very few common elements with " The Murders in the Rue Morgue " beyond the inclusion of C. Auguste Dupin and the Paris setting . Dupin reappeared in " The <unk> Letter " , which Poe called " perhaps the best of my tales of ratiocination " in a letter to James Russell Lowell in July 1844 . 
