Jackson, Mississippi in "Knight's Gambit" (Location)

As the story ends, Charles Mallison's mother is going to "ride with him down to the mainline junction" on the train that is taking him to Texas (252). A 'junction' is a town or city where different railroad lines intersect. Given Charles' final destination, it's most likely that the "junction" Faulkner is thinking of is Jackson, the capital of Mississippi, about 170 miles from where Jefferson is imaginatively located.