According to Sanctuary, "at almost any hour of the twenty-four" Negroes "might be seen" entering the house of the "half-crazed white woman" who reputedly sells them "spells" - i.e. magic potions (200-01). Many of them arrive at her house in "a wagon or a buggy," suggesting that they live in the country, not the town.
The two groups of "customers" who patronize Willy's drugstore in "Uncle Willy" are sharply distinguished by race - and by the kinds of things they buy. This is the group that the narrator refers to as the "niggers" who "buy cards and dice" (226).
Neither "Delta Autumn" nor the chapter with that title in Go Down, Moses makes clear how many people from Yoknapatawpha are in the hunting party, but at least several of them are black, and are there not to hunt but to serve the white hunters. The text names one, Isham, and singles out another as "the youngest Negro" (274, 335) - they have their own character entries. There is at least one more, because both narratives say that "two of the Negroes" cut firewood for cooking and warmth (272, 327).
This group represents the unnamed Negroes in "A Bear Hunt" who are not included in some other group: the blacks at the picnic who were not physically abused by the Provine gang, and the people whom the narrator refers to as "Negroes among us living in economic competition" with the white society; this latter group is identified as having "our family names" - i.e. the same last names as people in the white community (66).
This man appears in Young Bayard's thoughts as he derides himself for running away after his grandfather's death in Flags in the Dust: "You made a nigger sneak your horse out to you" (333). The novel elides the event Bayard is remembering, so we don't know anything more about the man.
In "The Unvanquished" and again in the chapter titled "Riposte in Tertio" in The Unvanquished, "one Negro in the county" was murdered and burned in his cabin by Grumby's Independents (93, 149).
While "running" away from the Choctaw plantation in "Red Leaves," the servant encounters this "motionless" man, "another Negro" (331). They exchange glances.