"It is now time that a mate for him be on the way," went on Omega wistfully. "He must have a sister, you know."
"It is true," she agreed with a glad smile.
Omega had spoken truly. Without a mate Alpha could not perpetuate the race. And so it was arranged that before the rising of the morrow's sun a new life should begin.
Science had steadily advanced the span of life. When Alpha was born Omega was two hundred years old, but that was only middle age. Thalma was twenty-five years his junior. The human birth-rate had decreased with the passing of the centuries and nature now demanded the most exacting conditions for the propagation of the human species. Thalma at her age could not afford to wait longer. Alpha's mate must be provided forthwith.
"Alpha wants to play a while before going in," Thalma continued presently. "I will remain with him."
"Very well, dear," said Omega. "I will go on and prepare dinner."
So saying he set his face toward the cottage, but before he had taken a dozen steps he was startled by a piercing scream from Thalma. He turned swiftly, then stood paralyzed with terror and amazement. Out of the cloud curtain surrounding the lake protruded the ugly scale-covered head and neck of the monster he had believed dead! And the horrible, swaying head was darting down toward the playing boy! The monster's jaws were spread wide, its black tongue was leaping out and in like lightning, the sickening saliva was dripping upon the sand, and its awful eyes were blazing like coals. And then in a twinkling the huge jaws seized the child, the head reared back, the jaws closed, stifling the lad's screams, and it started to draw back into the cloud.
But, after the first onrush of horror, life came again to Omega's numbed senses. He darted forward with a mad cry, and as he swung through the air rather than ran, he seized a stone and hurled it at the brute's head. His aim was true and the stone struck the great brute on the bony hood above the right eye. It did not harm, but it maddened the monster. Hissing horribly it swung Alpha high in the air and with a fling dashed him down upon the rocks. Then with a hoarse bellow it turned upon Omega. With its first forward lunge it seemed about to crush Thalma, who was between it and its intended victim. But the sight of her mangled child and the danger to her lord roused all the latent fury and courage in her soul and made of her a fighting demon. Like Omega she grabbed the first weapon at hand—a stone the size of a man's fist—and with the hot breath of the monster in her face she hurled the stone with all her strength straight into the red, gaping mouth.
With a blood-curdling scream the brute halted, reared backward, then ran its head back and forth over the rocks. Its loathsome body threshed about in the lake, throwing water far up on the beach. Then in its contortions it wallowed up out of the lake as it swung its terrible head about in agony, all the while hissing its challenge.