"Don't worry, Hi," soothed Hippy. "This outfit can take care of any bad characters that get in its way. I—"

"Merciful Heaven! What's that!" cried Emma Dean.

"Ping is in trouble!" cried Elfreda.

A shrill screeching, accompanied by the clatter of tinware, a struggle, then two quick shots brought the Overlanders to their feet. There was a quick rush toward the scene of the disturbance, the guide, Grace and Hippy in the lead as they ran stumbling over the rough ground in the darkness.

CHAPTER V

STALKING A MOUNTAIN MYSTERY

"Ping! Ping!" shouted the guide.

"Where are you, Ping Pong?" added Lieutenant Wingate.

A groan revealed the Chinaman's presence. They found him sitting on the ground, rocking back and forth holding the thumb of his right hand. A brief examination revealed that a bullet had clipped off the end of the thumb.

"I observe that we have started in early," declared Miss Briggs.
"Who did it?"