"Red Leaves" refers to the children of the slaves as "pickaninnies" twice: first when the servant sees them in the quarters, "naked in the dust" (328), and at the end, when he imagines the quarters and "the pickaninnies like ebony toys in the dust" (340).
In The Mansion, Ratliff notes that as the "new third president" of the bank Flem Snopes acquires "a black automobile" (though not a Packard) and "a Negro too" - though unlike the Negro who drove De Spain, Flem's driver "never had no white coat and showfer's cap" (174).
As Ratliff puts it in The Mansion, the "Negro" whom Manfred de Spain hires to drive him as President of the bank wears a "white coat and a showfer's cap" (174).
In Sanctuary this driver gives Popeye's grandmother "half a dollar" after he interprets her demand for it as a new system for paying for groceries (306).
In Requiem for a Nun this chauffeur works for the madam of the Memphis bordello where Popeye puts Temple, and occasionally drives her and the "madam" around the city "in a closed car the size of an undertaker's wagon" (113).
The Negro chauffeur in Flags in the Dust who offers to fetch Miss Jenny's driver Simon from the kitchen at the Mitchell house is "clad in army o.d. and a pair of linoleum putties" (30). ("O.d." is a military way of saying 'olive drab.')
The Harriss' chauffeur in "Knight's Gambit" is described as "a strange Negro in a uniform who did nothing but drive and wash and polish" the automobile (158). "Strange" in this context means 'not native to Yoknapatawpha.'
Major de Spain's unnamed house servant is the only black character in "Shall Not Perish." Even though Mrs. Grier twice asks de Spain "what is your Negro's name?," and after the second question the Major actually "calls the name," the narrator never tells us what it is (109). The narrator does, however, note that the man moves "without making any more noise than a cat" when he takes away the pistol from the top of the coffin (109).
In "Knight's Gambit" the "Negro butler" at the Harriss plantation opens the door to Gavin Stevens and Charles Mallison and "immediately vanishes" (249).