Which sentence from "Home on the Range" describes the setting?

Richard walked over, looked down into the cardboard box, and pulled out an old knapsack.
He reached in again and found a metal canteen, a pocket knife, and a tin cup.
He was sitting on a large rock, with the knapsack beside him and the harmonica still in his hand.
He wore jeans and a loose shirt, brown leather boots and a gray cowboy hat.