"It must be a regular trumpet-blast when the wind is high, for there isn't much now." The two incidents resulting so harmlessly, Fred was inspired with greater confidence, and advanced at a more rapid walk along the ravine, suffering no check until he had gone fully a mile further.

Just then, while striding along with increasing courage, he came to a place where the side of the ravine was perpendicular for two or three hundred feet.
He was close to this, so as to use the protection of the shadow, and was dreaming of no danger, when a rattling of gravel and debris caused him to look up, and he saw an immense mass of rock, that had become loosened in some way, descending straight for his head..