Complex sentence: In 1802, he was sworn of the Privy Council and sent to St. Petersburg as ambassador extraordinary, but he did not forsake the sea, and in 1806 he captured a large French warship, the "Marengo" at the Action of 13 March 1806.
Split into simpler sentences: In 1802, he was sworn of the Privy Council and sent to St. Petersburg as ambassador extraordinary, but he did not forsake the sea. In 1806 he captured a large French warship, the Marengo',' at the Action of 13 March 1806.