What can letters used as plot devices do

Explanation:

A card can reveal a lot of a plot. These revelations can make a story move more fluidly forward, share secrets, inner thoughts, expectations and ambitions of the characters. In addition, these revelations can bring a mystery and a suspense to the story.

In short, letters can be devices that can be used by the author as a way of revealing something about the character. This revelation can not be included in a dialogue, so the letter is the best option.

huck's relationship with food is a prominent theme throughout the novel, and during his time on jackson's island and working his way down river, huck revels in and enjoys his ad hoc dining. in the first chapter, we observe huck is ironically trapped in a "civilized" world, when he would prefer to live freely in nature.