"You're right on the job!" exclaimed Tom, climbing stiffly from the cabin. "How is everything?"

"All thing good!" declared the giant, grinning to see the young inventor back. "Catchum skystone?"

"We caught it, all right. You might tote this sample of it over to the lab." Tom handed his servant the segment he had chiseled from the main mass.

"Master knows 'bout secret cave under lab'tory?" questioned the giant as the two walked across the field in the moonlight.

"Tote This Sample to the Lab."

"Cave? Oh, you mean the vault?" asked Tom, who had been thinking of other matters.

"Night you go 'way in sky-bird, Koku watch. Koku hear bell go ting-ting-ting!"

Suddenly Tom was paying strict attention.

"Great Scott! D'you mean to say someone broke into my Chest of Secrets? Tell me about it quickly!"