“I still do not understand.”

“Very simple,” Joan put in impatiently. “You are wearing——”

“Cavern lights,” Moawha explained. “An invention of the Taunan pigmies which enables them to travel through the darkest recesses of the moon. So far my people have not been able to make them.”

Epworth looked around thoughtfully.

“I believe this is where we left our gliders,” he exclaimed hopefully. “Out toward the center of this ashy floor.”

“Joy be!” Joan shouted. “Put on your head gear, and let’s get to them. I am certainly fed up of crickets.”

At this moment there came a warning chirp from their right. They did not wait to ascertain how near the crickets were. Bolting forward Epworth lifted Moawha in his arms and, followed by Joan and Billy, ran rapidly across the deep ashes. They found their gliders almost by a miracle. Joan drew the shoulder straps over her head and shoulders and fastened them around her waist, and turned to Epworth.

“Let me have Moawha,” she entreated. “Billy will be too heavy in my plane.”

Without a word Epworth placed the girl in Joan’s glider, and darted to his own.

“Now, Billy, you and I together.”