on the right trail, and it was a relief to be able to busy oneself, and not be aimlessly searching for a mysterious landmark. They all felt this, and soon the airship was taken to a secluded part of the valley, where it was well hidden from sight in a grove of trees.
Tom and Mr. Damon then served a good meal, and preparations were made to start on their search among the mountains—a search which they hoped would lead them to Phantom Mountain, and the cave of the diamond makers.
The tent which would afford them shelter was in sections, and could be laced together. They carried food, compressed into small packages, coffee, a few cooking utensils; and each one had a gun, Tom carrying a combination rifle and shotgun, for game.
"We can't live very high while we're on the trail," said the young inventor, "but it won't be much worse than it was on Earthquake Island. Are we all ready?"
"I guess so," answered Mr. Damon. "How long are we going to be away?"
"Until we find the diamond makers!" declared Tom, firmly.
Shouldering their packs, the adventurers started off. Tom turned for a last look at his airship, dimly seen amid the trees. Would he
