Jefferson's telegraph operator in The Sound and the Fury not only dispenses telegrams but provides updates on the cotton market. Jason Compson berates him several times for not providing him with information quickly enough - though of course it is Jason's fault.
This is the diffident "young man" (according to Miss Jenny, at least) works as the Jefferson telegraph operator in Flags in the Dust (392). Because he knows, as Jenny does not, that Bayard has died, he doesn't know what to do after she hands him a telegram to send to Bayard.
These 'characters' are the ghostly presences that, according to the narrator of Flags in the Dust, still haunt the darkened and seldom-used parlor at the Sartoris plantation house: "figures in crinoline and hooped muslin and silk," and "in gray too, with crimson sashes and sabres" (56). They seem to be conjured up by Narcissa Benbow's piano playing.
Identified as the "son of a carpenter," this "youth" in Flags in the Dust occupies only half a paragraph of text, but his story contains a number of intriguing details (181). Despite his blue-collar origin, Belle Mitchell decides to "make a poet" of him, and sends him to New Orleans presumably as part of that process (181). Faulkner also wanted to be a poet, and went to New Orleans at the start of his writing career.
Described by the narrator of Flags in the Dust as "the General's body servant," this unnamed slave provides a kind of sound track to Aunt Jenny's story of Stuart and Carolina Bayard as "two angels valiantly fallen": he strums a "guitar in lingering random chords" at the Confederate unit's camp (12).
The captain of the ship that carries Horace back to the U.S. in Flags in the Dust seems fairly phlegmatic: when Horace's glass-blowing starts a fire in his cabin on board, at least according to Horace's account, he "decides that I'd better not try it again" until the reach land (138).
According to the narrator of Flags in the Dust, "each spring" a "certain few young girls" are allowed to pick flowers from the lawn at the Benbow house (164). Since they "ask permission" we can infer that they are polite (164). Their class status can be inferred from the first two adjectives that the narrator uses to describe them.