 "The Secret of the Unicorn" is partially set in 1676.In the English translation, the "Unicorn" sails under the Union Jack during the reign of Charles II of England and is commanded by Sir Francis Haddock, an ancestor of Captain Haddock.In Hergé's original French version, however, "" flies the French flag for the French Navy under King Louis XIV and is commanded by Chevalier François de Hadoque.