While Poe was in Baltimore, John Allan died, leaving Poe out of his will, which did, however, provide for an illegitimate child whom Allan had
never seen. By then Poe was living in poverty but had started publishing his short stories, one of which won a contest sponsored by the Saturday Visiter .
The connections Poe established through the contest allowed him to publish more stories and to eventually gain an editorial position at the
Southern Literary Messenger in Richmond. It was at this magazine that Poe finally found his life’s work as a magazine writer.
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The Broadway Journal failed in 1846.  Poe moved to a cottage in Fordham , New York , in what is now the Bronx . That home is known today as the "Poe Cottage" on the southeast corner of the Grand Concourse and Kingsbridge Road, where he befriended the Jesuits at St. John's College nearby (now Fordham University ).  Virginia died there on January 30, 1847.  Biographers and critics often suggest that Poe's frequent theme of the "death of a beautiful woman" stems from the repeated loss of women throughout his life, including his wife. 
See also the Poe entries in DLB 3: Antebellum Writers in New York and the South; DLB 59: American Literary Critics and Scholars, 1800-1850; DLB 73: American Magazine Journalists, 1741-1850; and DLB 74: American Short-Story Writers Before 1880.
Significant collections of Edgar Allan Poe's papers are located at the University of Texas (M. L. Stark Library and Humanities Research Center — the Koerster Collection); Pierpont Morgan Library, New York; Free Library of Philadelphia (the Richard Gimbel Collection); Henry E. Huntington Library and Art Gallery, San Marino, California; Indiana University (Lilly Collection); New York Public Library (Manuscript Division and the Berg Collection); University of Virginia (Ingram Collection); Enoch Pratt Free Library, Baltimore; Poe Foundation, Richmond (State Library of Virginia); Boston Public Library (Griswold Papers); Library of Congress (Ellis and Allan Papers); Columbia University Libraries; Duke University Library (Whitty Collection); Yale University, Beinecke Rare Book and Manuscript Library; also the private collection of H. Bradley Martin, New York City, which can be viewed in the Pierpont Morgan Library.
Celebrated as the first modern detective story, Poe's hero C. Auguste Dupin is featured in two subsequent tales, “The Mystery of Marie Roget" and “The Purloined Letter", but “Rue Morgue" is the most famous, and best of the three. One of the many Poe efforts made into an inferior, and terribly dated, film, it works best on the page. Using his powers of deliberation, Dupin is an undeniable model for Doyle's Sherlock Holmes. Poe is in full command of his considerable powers here, employing the process of investigation and discovery, cleverly employed humor and terror, and a character who proves he's smarter than everyone else.