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Author's note concerning Thorin's age:
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The only conflict with this story and the movie/book canon is Thorin's age. He is supposed to be twenty four years old at the time Smaug, the dragon, attacks Erebor.
I'm writing this story on the premise that he is older.
This is only a problem because dwarf ages differently than human ages: Humans live between 80-100 years while dwarves live to be around 250 years old. Obviously, with that in mind, dwarves reach maturity around 75 or so.
At a mere 24, Thorin would have been considered a child, but for the sake of appeal in a romantic story, we can blur those lines a little. Other than his age, everything else seems to be in order.