Elba is a Mediterranean island in Italy (Tuscany), where French Emperor Napoleon I was exiled after his forced abdication in 1814. Napoleon stayed on Elba for 300 days before his return to France on February, 1815 for the Hundred Days.
In The Count of Monte Cristo by Alexandre Dumas, Edmond Dantès was charged by dying captain Leclère to deliver a package to Bonapartist General Bertrand on Elba. There, Edmond was given a letter to deliver to an unknown man in Paris. Because of this letter, Dantès will eventually be accused of being a Bonapartist traitor.