Napoleon wrote the letter from exile in Saint Helena and according to the BBC
it is just one of three letters to be written in English by the French Emperor.
The letter, which was sold by the auction house Osenat in Fontainebleau, set off a fierce bidding war. The prize was purchased by the French Museum of Letters and Manuscripts in Paris. A copy of the letter can be seen at here
reported Jean-Pierre Osenat, President of Osenat, said the letter was a homework exercise to be sent to Napoleon's English teacher, the Comte de las Cases, for correction.
Osenat said Napoleon was studying English as "he wanted to read what was said about him in the English press."
An excerpt from the letter reads "He shall land above seven day a ship from Europe that we shall give account from anything who this shall have been even to day of first january thousand eight hundred sixteen."
Napoleon died in exile on Saint Helena in 1821, five years after the letter was penned.