In The Sound and the Fury, at "a filling station" in Mottson, "they" tell Jason where the traveling show can be found (308). The novel provides no evidence about who "they" are - whether customers or attendants at the gas station, or both.
Jason refers to China when he thinks about the rich man in Jefferson who sponsored a "Chinese missionary" - by which he presumably means an American who travels to China as a missionary (194).
In The Sound and the Fury Jason mentions this "Chinese missionary" whom the rich Jefferson merchant "bought" for "five thousand dollars a year," in order to ease his conscience (194). The reference is ambiguous enough to possibly mean the missionary himself is 'Chinese' or perhaps Chinese-American, but it is far more likely that he is a white American on a religious mission to China.
In The Sound and the Fury these two men help break up Julio's attack on Quentin, and then keep an eye on Julio during the walk to the Squire who will decide Quentin's case. They may be the marshal's assistants, or simply two bystanders who are pulled into the story by Julio's attack on and accusation against Quentin.
In The Sound and the Fury these two men sitting in front of a store talk to Quentin during his attempt to find the home of the little girl he met in the bakery.
In The Sound and the Fury this woman is mentioned by Jason when he remembers the last time he saw Lorraine in Memphis. He gives "the maid" five dollars (194). It is likely that Lorraine herself is a prostitute, and that the maid works for the brothel, not Lorraine personally. And while Jason does not specifically say the maid is black, based on the other maids in and out of brothels in Faulkner's world it is safe to assume she is.
On the interurban that carries him back to Cambridge in The Sound and the Fury, Quentin self-consciously notices how the other passengers in the car are all "looking at my [black] eye" (170). One passenger is individualized: looking at his reflection in the window of the car, Quentin sees superimposed on his own face the reflection of this woman sitting across the aisle from him, wearing a hat "with a broken feather in it" (169).
When Quentin boards the first of the Boston streetcars he rides during the day in The Sound and the Fury, he notes that it full of "mostly prosperous looking people reading newspapers" (86). Specific passengers in the car include a Negro who is wearing "a derby and shined shoes" and holding "a dead cigar stub" - having to sit next to him prompts Quentin to reflect on the relationship between blacks and whites (86). Other passengers are "women with market baskets" and a man in "a stained hat with a pipe stuck in the band" (89).
