Identified in Flags in the Dust only as "young," "American," and an "employee of the Standard oil company," he and Joan Heppleton are married for one year, presumably living in Calcutta where she meets him (321). At the end of that time they are divorced.
In Flags in the Dust this man and Colonel Sartoris met while they were both servng in the Mexican War. After the Civil War, Sartoris brings him to Yoknapatawpha to help with the building of the railroad. He seems bemused by Jenny Du Pre's story about "Carolina" Bayard in the one scene in which he appears.
One of the men Colonel Sartoris kills in Flags in the Dust is called "that robber" by Will Fall; the context suggests he was trying to rob the money Sartoris carried as he was building the railroad through Yoknapatawpha. (This character and "that other feller" Sartoris kills in this novel seem combined into the character of the unnamed "hill man" in The Unvanquished, 23.)
In Flags in the Dust Will Falls distributes the "pint of whisky" that is always part of the Thanksgiving and Christmas gift baskets given him by the Sartorises "among his ancient and homeless cronies" (301) in the county poorhouse.
Flags in the Dust characterizes the residents of Horace's new 'home' town - where he is clearly in exile - negatively. They have turned a Mississippi hamlet into a prosperous but squalid town. The engine of its economy is a factory making an unspecified product from the local cypress trees, which are all being chopped down. The narrator labels this populace with a series of pejorative terms, including "brigands" and "bugs" (373).
This represents four different groups of children in Flags in the Dust: (1) The children playing in the street whom Bayard, riding the wild stallion, swerves to avoid running into; only one is individualized: "a small figure in a white shirt and diminutive pale blue pants" (130). (2) The "neighbors' children" who play "quietly" among the flowers and trees on the lawn at the Benbow house (164). (3) The children playing "quietly and a little stiffly" in the cemetery that Jenny and Isom visit at the end of the novel (399). All these groups appear in Jefferson.
In Flags in the Dust, Joan Heppleton goes back to her family's home town "from time to time" after her globe-trotting experiences, where she attracts the stares of the "neighbors, older people who had known her all her life," the younger people she had grown up with, and "newcomers to the town" (322). The narrative never says where "home" is (in Sanctuary we hear that Belle is from Kentucky), but it seems to be like Jefferson in the sense that Joan's obviously modern, emancipated behavior and appearance is something new and disconcerting.
These are the various inhabitants of the town in Flags in the Dust from which Young Bayard catches the train that takes him into exile. When he looks at them at the end of Christmas day, he sees various "cheerful groups," including children playing with new presents, youths exploding fireworks, and travelers waiting with friends in the racially segregated "waiting rooms" at the station (369).
In Flags in the Dust, when Bayard drives north to the university town where his passengers will serenade the women students, they go through the "streets identical with those at home" (142) - which may be Faulkner's covert way of acknowledging that Jefferson is based closely on Oxford, where he is writing the novel. When Bayard reaches "an identical square," "people on the square" turn to look at the car, with three young white men in front and three black musicians in back, "curiously" (142). That reaction, however, is all that we learn about the people who live in Oxford.
As part of the description of Doctor Peabody in Flags in the Dust, the narrative mentions his willingness to travel any distance "to visit anyone, white or black, who sent for him" (95). Later in the description a few of his patients are particularized when a "countryman" - that is, someone from outside the town of Jefferson - visits Peabody in his office to pay the doctor's bill "incurred by his father or grandfather" (95).