How does Charles Portis use imagery in The Dog of the South?

Examples of Imagery:

I slept in the car again, although I didn't like it, being exposed that way to people walking by and peering in the windows, watching me sleep. It was like lying supine on the beach with your eyes closed and fearing that some terrible person in heavy shoes will come along and be seized by an impulse to stomp on your vulnerable belly.

I would lay Dupree out in that hammock when I had killed him...I would leave him in the hammock with a candle burning in his mouth....