Complex sentence: Upshur was admitted to the bar in 1810; he briefly set up practice in Baltimore, Maryland, but returned to Virginia after the death of his father, where he set up a thriving law practice and became active in state politics.
Split into simpler sentences: Upshur was admitted to the bar in 1810; he briefly set up practice in Baltimore, Maryland, but returned to Virginia after the death of his father. He developed a thriving law practice and became active in state politics.