He was distressed also about the bill before Congress to lift the embargo on San Domingo and commence trade with the “rebellious Negroes under Toussaint.” When “Toussaint’s clause” was passed, Jefferson noted bleakly, “We may expect therefore black crews and . . . missionaries” pouring “into the Southern states. . . . If this combustion can be introduced among us under any veil whatever, we have to fear it.”