"Have you never gone roaming among the bushes and shrubs, Yonyo?" he demanded, speaking with a fury born partly of the bright appeal in her face, and partly of the breathless interest of a great discovery. "Have you never noticed how one may twist and bend the small shoots, so that they will swish back with terrible force? I was wondering, Smiling-Eyed, if I could stretch a stout fiber between the ends of one of those shoots. Then I could bend and hold it so that it would swish back whenever I wanted. And it might throw a sharp stick through the air like a rock, and make a weapon that would strike from far away—"

"And strike those foolish thoughts from your head!" derided Yonyo, bursting again into laughter.

Ru, cut short at the climax of his discourse, felt a renewed impulse to seize and throttle her.

But perhaps she divined his intention, for with a scornful, "The Sparrow-Hearted has need of new weapons!" she went darting down the shadowy passageway, and in a moment had disappeared around a bend, her mocking laughter ringing merrily behind her.

Within Ru's breast a choking anger arose; and her flight was like a challenge to follow. With furious eyes and fast-heaving heart he set off in pursuit, filled by a blind desire to seize the elusive one and crush her madly to him.

But she was swift of foot, and in those dark corridors he could not even see her flying form. Only her laughter, echoing merrily through the gloom, told him that she was not far beyond; and such was his frenzy that he had little thought of possible danger, but dashed ahead despite the risk of stumbling over some unseen rock or depression in the cavern floor.

Yet not until he had approached the great fire at the cave entrance did he see her again. Then, still with a smile upon her taunting face, she stood gleefully awaiting his arrival. But she was not alone—just ahead of her, overshadowing her like a protective tower, stood Woonoo the Hot-Blooded!

And from the ugly thick lips of the giant there issued a menacing snarl; and the bull-like form advanced with powerful arms outspread to seize and strangle his adversary.

Knowing better than to risk a conflict, Ru merely answered his opponent's challenge growl for growl, while backing away at no inconsiderable speed. Then, when suddenly the Hot-Blooded tired of delay and started toward him with a swift ferocious lunge, Ru turned and raced furiously back into the shadows.

And merry was the tittering of Yonyo, as she witnessed the rout of the weakling. And merry was the laughter of the tribespeople as they watched Ru's hasty retreat, and murmured: "See the Sparrow-Hearted run! How well the Sparrow-Hearted runs!" But dark indeed was the gloom within the heart of Ru when at length he had outdistanced his rival and slouched sulkily back to his lonely fire in the loneliest, farthest corner of the cave.