Complex sentence: Captain Matthew Smith took command in 1808, and "Comus" continued off the Portuguese coast and in the Mediterranean, in March 1814 being tasked with the delivery of £600,000 to Arthur Wellesley, Marquess Wellington.
Split into simpler sentences: Captain Matthew Smith took command in 1808, and "Comus" continued off the Portuguese coast and in the Mediterranean. In March 1814 she delivered £600,000 to Arthur Wellesley, Marquess Wellington.