Lonesome Dove, Volume 1 by Larry McMurtry

"NEWT, YOU LOOK like you just wiggled out of a flour sack," Pea Eye said. He had taken to making the remark almost every evening. It seemed to surprise him that Newt and the Rainey boys came riding in from the drags white with dust, and he always had the same thing to say about it. It was beginning to annoy Newt, but before he could get too annoyed, Mr. Gus surprised him out of his wits by telling him to lope over to Jake's camp and keep watch for Lorena until Jake got back.

"I wish I could clean up first," Newt said, acutely conscious of how dirty he was.