Complex sentence: Finally, he was created Viscount Keith in the Peerage of the United Kingdom, and died on the 10th of March 1823, when the viscountcy and 1801 barony became extinct, while the 1797 and 1803 baronies passed to his daughter.
Split into simpler sentences: Finally, he was created Viscount Keith in the Peerage of the United Kingdom. He died on 10 March 1823, when the viscountcy and 1801 barony became extinct, while the 1797 and 1803 baronies passed to his daughter.