In a frame of mind when every newcomer was a probable tormenter, the mongrel resolved to meet this white-clad foe, head-on. He swerved, with a stagger, from his bee-line of travel; growled hideously, and sprang full at her. The Mistress paused, for an instant, in the middle of the sidewalk, to find out the reason for the sudden din that had assailed her ears as she emerged from the post-office. In that brief moment, she caught the multiple-bellowed phrase of "Mad dog!" and saw the black brute charging down upon her. There was no time to dart back into the shelter of the building or to gain the lesser safety of the car. For the charging mongrel was not five feet away. The Mistress stood stock-still; holding her hands at a level with her throat. She did not cry out; nor faint. That was not the Mistress's way. Like Lad, she was thoroughbred in soul as well as in body. And neither she nor her dog belonged to the breed of screamers. Through her mind, in that briefest fraction of a second whizzed the consoling thought: "He's not mad, whatever else he is. A mad dog never swerves from his path." But if the Mistress remained moveless, Lad did not. Seeing her peril even more swiftly than did she, he made one lightning dive from his perch on the car seat. He did not leap at random. Lad's brain always worked more quickly than did his lithe body; flyingly rapid as were that body's motions. As he gathered himself for the spring, his campaign was mapped out. Down upon the charging beast swooped a furry whirlwind of burnished mahogany-and-snow. Down it swooped with the whirring speed and unerring aim of an eagle. Sixty-odd pounds of sinewy weight smote the lunging mongrel, obliquely, on the left shoulder; knocking the great brute's legs from under him and throwing him completely off his balance. Into the dust crashed the two dogs; Lad on top. Before they struck ground, the collie's teeth had found their goal ire the side of the larger dog's throat; and every whalebone muscle in Lad's body was braced to hold his enemy down. It was a clever hold. For the fall had thrown the mongrel on his side. And so long as Lad should be able to keep the great foaming head in that sideways posture, the other dog could not get his feet under him again. With his legs in their present position, he had no power to get up; but lay thrashing and snapping and snarling; and trying with all his cramped might to free himself from the muscular grip that held him prostrate. It was all over in something like two seconds. Up stormed the crowd; the pistol-wielder at its head. Three shots were fired at point-blank range. By some miracle none of them harmed Lad; although one bullet scratched his foreleg on its way to the black giant's brain.