Thrimston Hern, the son of David and Isabel Hern, was enslaved by Thomas Jefferson at Monticello. He was a woodworker until 1820, when he was trained in stone cutting by John Gorman, who completed various masonry projects at Monticello and at the University. In 1829 University proctor Arthur S. Brockenbrough bought Hern from Jefferson’s estate for $600 and proposed that he cut the stone for the steps of the Rotunda. Life dates 1799-after 1831