But to sum up the Antebellum period: there were no (legal) importation of slaves to Louisiana from Africa or the Caribbean. Saint-Domingue and Cuban refugees who arrived between 1809 and 1810 in New Orleans did bring slaves with them. But they remained mostly in New Orleans and to a lesser extent in Pointe-Coupée, the Acadian and German Coasts (all along the Mississippi River). Nathalie Dessens’s study (From Saint-Domingue to New Orleans) as well as Emily Clark’s discuss this. The vast majority of slaves entering Louisiana during the Antebellum period entered New Orleans slave market by way of the US interstate market, mostly from Virginia, with smaller numbers from Kentucky, Maryland, and Tennessee. This is why so many Creoles in Grand Côteau and Sunset have English surnames – the Jesuits were ousted from Maryland in 1821 and they established a colony, with their slaves, at Grand Côteau that year. That colony became Sacred Heart Convent, Sacred Heart Church (now St. Charles Borromeo) and St. Charles College school for (white) boys.
So by 1860, on all Creole plantations, there was a mixture of Creole, American, and really old African slaves; whereas on American plantations in Louisiana, virtually all slaves were Americans, with few Africans.