Maria Magruder Shanley (1795-1864), whose grandfather Capt. Nathaniel Magruder (d. 1785) had been a prominent patriot during the American Revolutionary War. Of their children, two sons died in 1832 but two sons and two daughters survived to adulthood, including their first born, David (who became a civil engineer in the capitol city) and their youngest George W. Watterson (1848-1864). In 1820, Watterston owned four enslaved people, but only one in 1830 (a woman in her 30s, and a free black man of similar age also lived with the family). Ten years later, Watterston owned five slaves (all under age 25), and in the final census before his death, owned one 18-year old black woman and a young girl. Death and legacy Watterston died in 1854, and was buried in the Congressional Cemetery in Washington, D.C., where his widow would join him a decade later. Their youngest son George would move to Livingston County, Louisiana, buy land in 1860, and enlist in the Confederate States Army as a private in Louisiana's Washington artillery as the American Civil War began. He died in 1864 of complications of wounds received shortly after the Battle of Gettysburg, although having left progeny. Watterston's former house in Washington, D.C., still exists, as a contributing structure in the historic district near the Library of Congress. References Additional sources 1783 births 1854 deaths Librarians of Congress American people of Scottish descent Charlotte Hall Military Academy alumni Maryland Whigs People from Washington, D.C. Burials at the Congressional Cemetery