As the carriage approached, they darted away into the woods, but soon after a shower of gravel and sand flying into the carriage, as it slowly toiled up a hill between two walls of rock, made it known in a very disagreeable manner that they had returned to annoy our party by further mischief. They kept out of sight behind the trees and rocks, however; and when Fred, who was furiously angry, begged Mr. Porter to go after them with his long whip, the loud, taunting laugh which rang from above told that their tormentors felt themselves secure from punishment.