R Edmund Randolph (1753–1813), American statesman. Eight of his slaves were freed by the Gradual Abolition Act of 1780. John Randolph (1773–1833), American statesman and planter, and one of the founders of the American Colonization Society. John Reynolds (1788–1865), 4th Governor of Illinois, owned seven slaves whom he emancipated over 20 years. George R. Reeves (1826–1882) Texas sheriff, colonel, legislator, and Speaker of the Texas House of Representatives, and was also the owner of Bass Reeves, who later became a notable lawman. Daniel Robertson (1733–1810), British Army officer in North America, manumitted Pierre Bonga and his parents at Mackinac Island, as well as Hilaire Lamour in Montreal, but insisted that Lamour pay for the release of his wife Catherine in 1787. William Barton Rogers (1804–1882), American scientist and founder of MIT, he enslaved at least six people, including Isabella Gibbons. Juan Manuel de Rosas (1793–1877), Governor of Buenos Aires Province who oversaw the revival of the slave trade in Argentina. Isaac Ross (1760–1836), Mississippi planter who stipulated in his will that his slaves be freed and moved to Africa. Anne Rossignol (1730–1810), Afro-French slave trader. Isaac Royall Jr. (1719–1781), a colonial American landowner who played an important role in the creation of Harvard Law School. Peter Russell (1733–1808), gambler, government official, politician and judge in Upper Canada. John Rutledge (1739–1800), 2nd Chief Justice of the United States, he enslaved as many as sixty people at one time. S Elisabeth Samson (1715–1771), Surinamese plantation owner and daughter of a formerly enslaved woman. Ana Joaquina dos Santos e Silva (1788–1859), Afro-Portuguese slave trader in Angola. Ernst Heinrich von Schimmelmann (1747–1831), Danish politician and planter, he opposed the Atlantic slave trade but supported slavery, owning enslaved people in both Copenhagen and his Saint Croix plantation. Sally Seymour (died 1824), American pastry chef and restaurateur, formerly a slave. J. Marion Sims (1813–1883), physician, founder of gynecology. He performed medical experiments on enslaved women whom he bought or rented. Ashbel Smith (1805–1886), physician, diplomat, slave owner, Republic of Texas official, Confederate officer and first President of the Board of Regents of the University of Texas. An anti-abolitionist, he helped lead efforts to keep Texas a republic and slave state. Emilia Soares de Patrocinio (1805–1886) was a Brazilian slave, slave owner and businesswoman. Hernando de Soto (–1542), explorer and , he enslaved many of the indigenous people he encountered in North America. At the time of