Suppose we ride over and take a look at the spot. He smiled at her little shudder

"Suppose we ride over and take a look at the spot." He smiled at her little shudder of repugnance. "We haven't any Sherlock Holmes in this country, and maybe we need one. I'll have a try at it. Come oni"
In response to the pressure of his knees, the trained cow-pony whirled toward the Jack-pines, and Dorothy followed, laughing at the idea
that so ingenuous a man Lem Trowbridge might possess the analytical gift of the trained detective.
"You!" she said mockingly, when she had caught up with him. "You're as transparent as glass; not that it isn't nice to be that way, but still you
are. Besides, the rain we've had must have washed all tracks away."
"No doubt, but we'll have a look anyhow. It won't do any harm. Seriously, though, the ways of criminals have always Interested me. I'd rather
read a good detective story than any other sort of yarn."
(from Hidden Gold by Wilder Anthony)

How does the author use the allusion to Sherlock Holmes in the passage?
1. to suggest that the setting is a dangerous society where crimes go unsolved
2. to develop Lem's character by showing who he'd like to imitate
3. to further the plot by foreshadowing that dangerous situations are to come
4. to establish the tone of the story as dark and mysterious