During the final battle, when Kylie's soldier is looking at the "American" newspapers dated the previous day, Sharpe says, "The fastest clipper on earth couldn't cross the Atlantic in a day!" The term "clipper", in reference to a type of sailing vessel that sacrificed cargo capacity for extreme speed, didn't come into general usage for another twenty years or more.
Around 43m30s there is a crew member wearing a white shirt and blue shorts visible on the left hand side of the shot watching the fight scene.