Just about this time the marmot, a much larger animal, scuttled down the hill, whistling steadily and wrinkling up its back like a caterpillar in a hurry. What happened, of course, was that the earth sent along a preliminary notification to the creatures who delve in the earth and live in the earth, telling them their ancient mother was about to have a very hard chill. This is the way a layman might put it; no doubt a geologist would phrase the explanation differently. But it was a warning, all right enough. While Chaney still was mildly speculating regarding the reasons for the panic among these ground-dwellers, the solid boulder beneath his feet seemed to lift and stir and the scrub aspens behind him all at once began to bend the wrong way, that is, toward the wind instead of from it. So then he knew it must be a quake. Instinctively he slid off the stone and splashed down on the loose shale in the edge of the creek bed. As he half crouched there, up to his shanks in water and suddenly apprehensive, he felt through his boot soles a progressive rippling movement that grew swift and more violent. It was as though the world were flindering its skin on the haunches of these mountains precisely as a pestered horse does to get rid of a horse-fly. Evidently this meant to be quite a shock. It was quite a shock. The newspapers were full of it for a week; the scientists were full of it for months after the newspapers eased up. Over in southern California it shuffled the houses of one coast town like a pack of cards and down in the Wyoming Rockies it blocked a gap through which a river ran, so that a valley of ambitious irrigation projects became a lake while the dispossessed residents were getting their families and their cattle out. But when Chaney looked up and saw the face of the cliff above him starting to come loose, he very naturally jumped to the conclusion that the whole thing had been devised for the main purpose of annihilating him; there was going to be a disaster and he was going to be the chief victim. The mental process of any normal human being would operate thus in a similar abnormal emergency. Lightning strikes near us and in the moment of escape we give thanks for deliverance from a peril launched expressly at us. Heaven sped its direst artillery bolt with intent for our destruction, but we were too smart for it; we dodged. Probably it is mortal vanity that makes us say that to ourselves--and even believe it. We are forever assuming that nature gets up her principal effects either for our benefit or for our undoing.