Book Reports / Thesis statement for analytical essay on Pastoral Motif and its changing depiction [3]

Q.We've spent a good deal of time thinking about the pastoral motif in American literature
and how its embodiment has changed over time. Discuss Frost's "Stopping by Woods on
a Snowy Evening," in relation to ONE of Twain's Adventures of Huckleberry Finn (the
Mississippi River) and Cather's The Professor's House (The Blue Mesa).

I picked Huck Finn by Twain.

This is what I came up with: The deep dark woods in the winter evening provided Robert Frost an experience that caused him no danger yet tempted him to remain in the woods eventually letting him leave as a changed man. The Mississippi river took Huckleberry Finn and Jim away from their world and put them back after enriching them with various experiences that changed them forever. However, the Mississippi river put them into and saved them from danger many a times.

If anyone can give me some guidance as to how to make it more focussed and argumentative I'd really appreciate it. This is my first time on this website so please feel free to make any corrections in my thread.

Thanks a lot