Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. HMS Swiftsure was a 74-gun third rate ship of the line of the Royal Navy, launched from Bucklers Hard on 23 July 1804. She fought at Trafalgar. The French 74-gun ship Swiftsure also took part in the battle. She had originally been a British ship, but was captured by the French in 1801. It was a myth at the time that the Swiftsure sailed faster at night.