several times, urged him to be careful of the dangers he would be likely to encounter.
Tom said nothing to her of the head hunters. He did not want to alarm Miss Nestor, and then, too, he thought the less he allowed his mind to dwell on that unpleasant feature of the journey, the less likely it would be to get on the nerves of all of them.
Ned was right when he predicted that Tom would make quite a lengthy visit. There was much to talk about and he did not expect to see Mary again for some time. But finally he realized that he must leave, and with a renewed promise to bring back with him the two small gold images. and after saying good-bye to Mr. and Mrs. Nestor, Tom took his leave.
"If you get marooned in the underground city, Tom," said Mr. Nestor, "I hope you can rig up a wireless outfit, and get help, as you did for us on Earthquake Island."
"I hope so," answered our hero with a laugh, and then, a little saddened by his farewell, and pondering rather solemnly on what lay before him—the dangers of travel as well as those of the head hunters—Tom hastened back to his own home.
The young inventor found Ned busy over the list of supplies, diligently checking it and com-
