Complex sentence: In 1803 following the Peace of Amiens, "Doris" took two more French privateers but in 1805 under the command of Captain Patrick Campbell, "Doris" was lost on a rock off Quiberon Bay.
Split into simpler sentences: In 1803 following the Peace of Amiens, "Doris" took two more French privateers. In 1805, while under the command of Captain Patrick Campbell, "Doris" was lost on a rock off Quiberon Bay.