"Oh, I think it's fun," Jack assured them.
The hills were heavily wooded and in many places there was hardly more than room for them to pass between the trees, so closely did they grow on either side of the trail.
"Hark!"
Sue, who was riding a few feet ahead of Bob, pulled up her horse. "Listen," she said.
A sound as if someone was shaking dried peas in a pasteboard box was plainly heard.
"What is it?" Bob asked.
"It's a sidewinder."
"A what?"
"Why, a sidewinder."
"Guess you'll have to explain."