The two men stood there glaring at each other, Oak perched, and yet not perched, so broad and perfect was his foothold, on the crest of a slight shelf of the downward slope. There stood the two men, poised, the one above, the other below, two who had been as close together from childhood as all the attributes of mind and body might allow, and yet now as far apart as human beings may be. They were beautiful in a way, each in his murderous, unconscious posing for the leap. The sun hit the blue ax of Oak and made it look a gray. The raised ax of Ab, which was of a lighter colored stone, was in the shade and its yellowness was darkened into brown. The spectacle lasted for but a second. As Oak leaped Ab bounded aside and they stood upon a level, a tiny plateau, and there was fierce, strong fencing. One could not note its methods; even the keen-eyed wolverine, crouching low upon an adjacent monster limb, could never have followed the swift movements of these stone axes. The dreadful play was brief. The clash of stone together ceased as there came a duller sound, which told that stone had bitten bone. Oak, slightly the higher of the two, as they stood thus in the fray, leaned forward suddenly, his arms aloft, while from his hand dropped the blue ax. He floundered down uncouthly and grasped the beech leaves with his hands, and then lay still. Ab stood there weaponless, a creature wandering of mind. His yellow ax had parted from his hand, sunk deeply into the skull of Oak, and he looked upon it curiously and vacantly. He was not sane. He stepped forward and pulled the ax away and lifted it to a level with his eyes and went to where the sunlight shone. The ax was not yellow any more. Meanwhile a girl was flitting toward her home and the shadows of the waning day were deepening. CHAPTER XIX. A RACE WITH DREAD.