The existence of African slaves in the American South was largely the result of foreign interests and New England slavers importing already-enslaved black people from Africa. With the agricultural expansion of the United States enabled by the Louisiana Purchase, large numbers of laborers were required to work the fields.
Bernhard Thuersam, www.Circa1865.com
The Foreign Slave Trade in Antebellum Mobile
“An illicit market in Mobile supported foreign slave trade despite the federal prohibition against it since 1808. Reports appeared occasionally of African natives working in the city. In March 1859, according to the British consul, “twenty wild African Negroes” worked in Mobile. Since these slaves spoke only their native dialect, residents concluded that the slaves were recently imported. Their appearance sparked excitement among the citizens about the foreign slave trade.
Later in 1859 the schooner Clotilde, owned by the Northern-born steamboat builder Timothy Meagher, transported what was reputedly the last cargo of contraband slaves from Africa to the United States. Slavers then transported 116 survivors of this voyage to John Dabney’s plantation on the Alabama River a few miles north of Mobile. Some slave-owners in the area secretly purchased some of the Africans, and the shipowner and captain retained the rest.
Slave ownership remained confined to a small proportion of the free population of Mobile, slightly less than 6 percent in 1830 and 1840. Masters and mistresses came from widely different backgrounds and occupations. In 1860, New Englanders like Thaddeus Sanford, a newspaper publisher turned farmer; Gustavus Horton, a cotton broker; and William, Rix, a merchant, owned slaves. So did foreign-born Mobilians like Israel I. Jones and Jonathan Emanuel, [both] English-born merchants; Ann Yuille, a Scottish baker’s widow; and Albert Stein, a German-born hydraulic engineer.
In 1850, 191 women owned 807 slaves. Women made up nearly 10 percent of large slaveholders, those with 11 or more slaves, in 1850. By renting some of their slaves to local employers, widows received good incomes.
Sarah Barnes, sixth largest slaveowner in Mobile in 1850, presumably rented some of her 52 slaves to others. So did two other women with large slaveholdings in the 1857 city tax book. Eliza Goldthwaite, widow of a former State judge, who claimed 17 slaves, and Sarah Walton, widow of a former mayor of Mobile and mother of Octavia Walton Levert, owned 20 slaves.”
(Cotton City, Urban Development in Antebellum Mobile, Harriet E. Amos, University of Alabama Press, 1985, excerpt, pp. 87-89)