"Africa" is mentioned in the novel's brief biography of Paul Rainey, a real person who - as the narrator notes - was a hunter and "a hound man primarily"; he "took his pack of bear hounds to Africa to see what they would do on lion or vice versa" (163).
"Africa" appears explicitly in the novel only as an adjective, when in its penultimate paragraph Shreve tells Quentin that "in a few thousand years" they "will also have sprung from the loins of African kings" (302). But in Chapter 7, in the context of Sutpen's experience in Haiti, there are references to "what we call the jungle" and "the dark inscrutable continent" that is the source of "the black blood" that is supposedly in the veins of 'black' people (202).
According to Gavin, "the rest of the world, at least that part of it in the United States, rates us folks in Mississippi at the lowest rung of culture" (167). This entry represents those people outside Mississippi - especially in the North.
