Now he was racing back again, running as madly as if a troop of demons was after him. A flash cleft the darkness; a deep detonation thundered and echoed against the hills; the building against which Hetty leaned shook as if an earthquake had seized it, and Thursday Smith was thrown flat on his face and rolled almost to the terrified girl's feet, where he lay motionless. Only the building saved her from pitching headlong too, but as the reverberations died away, to be followed by frantic screams from the rudely wakened population of Millville, Hetty sank upon her knees and turned the man over, so that he lay face up.