Complex sentence: The 1820 U.S. Census has two persons named Thomas Beale, in Louisiana and Tennessee, and a Thomas K. Beale in Virginia, but the population schedules are completely missing for three states and one territory.
Split into simpler sentences: The 1820 U.S. Census has two persons named Thomas Beale, in Louisiana and Tennessee, and a Thomas K. Beale in Virginia. But the population schedules are completely missing for three states and one territory.