hole, and that without a shot being fired. A little later the three men, who had hurried away from the cave as Mr. Foger rushed up to see what caused the racket, joined Tom and Ned, and formal possession was taken of their lucky strike.
"We'll guard it well, now," decided Tom, and later that day they moved some supplies near the hole, and for a shelter built an igloo, Eskimo fashion, in which work Abe had had some experience. Then they moved the airship to another ice cave, nearer their "mine" as they called it, and prepared to stand guard.
But there seemed to be no need, for the following day there was no trace of the Fogers. They and their natives had disappeared.
"I guess we were too much for them," spoke Tom. But the sequel was soon to prove differently.
It was three days after our friends had regained their mine, during which time they had dug out considerable gold, that toward evening, Tom was taking the last of the output of yellow pebbles into the cave where the airship was, he looked across the valley.
"Looks like something coming this way," observed the young inventor. "Natives, I guess."
"It is," agreed Ned, "quite a large party, too!"
"Better tell Abe and the others," went on Tom.
