Given the political realities of Mississippi circa 1930 it's safe to say that the jurors in Lee's trial are all white and male, but all the narrative ever says about them is that, after Temple's testimony brings the proceeding to an inexplicable end, they take "eight minutes" to convict him of a crime he did not commit (291).
In Sanctuary the judge who presides over Lee's trial is never individualized at all. He is not even called 'judge' by the narrative, just "the Court" (270, 282, etc.). (Similarly, throughout the trial the prosecuting attorney, who has already been carefully characterized by name as Eustace Graham, is not called anything but "the District Attorney" [283, etc.]. It is a curious elision on Faulkner's part.) We identify him as "upper class" based on the status of the title "Judge" in Faulkner's other fiction.
We see the people who watch Lee's trial from Horace's perspective, as he enters the courtroom. From this point of view they are a collection of "heads": "bald heads, gray heads, shaggy heads and heads trimmed to recent feather-edge above sun-baked necks, oiled heads above urban collars and here and there a sunbonnet or a flowered hat" (281). The details suggest that the crowd is mostly male, but drawn from almost all the local social classes. There is, however, no suggestion that any of these people aren't white.
During the First World War, Ruby worked in New York City, where according to her "even the little ratty girls [were] wearing silk," presumably as presents from all the "soldiers with money to spend" (278).
Ruby worked in New York during the First World War; according to her, the city was "full of soldiers with money to spend" (278). New York City was the first officially designated embarkation point for the hundreds of thousands of soldiers who were sent to France.
