In the particular scene you are referring to,
happens in Chapter 8, which is the second-to-last chapter of the novel. Even though the setting within which this
phrase occurs happens in the morning, which one usually relates to new
beginnings, the word “autumn” serves to symbolize the ending of things the way things
sort of die off in autumn and sort of pause—leaves falling off trees and
animals beginning to hibernate. Thus,
because Nick’s tale is coming to an end, it is symbolically significant that
the mental image of the fall season is presented to readers as a sort of
foreshadowing.
