on the train. I'll tell you about it later. And I've got a lot more to tell," Dave went on. "All about a lost gold mine that belongs to Mrs. Morr, Roger's mother."
"A lost gold mine!" exclaimed Dunston Porter. "Is this a joke, Dave?"
"No, sir, it's the truth. The strangest tale you ever heard. When we go out to Yellowstone Park we—that is, us boys—are going to look for the mine."
"Of all things!" burst out Laura. "Say, Dave, will you ever settle down? Here I thought you were going to take a nice little personally-conducted tour with us, and you talk of going land knows where to look for a lost gold mine!"
"Is it very far?" asked Jessie, and her face showed some disappointment.
"Oh, it's not very far from Yellowstone Park," answered the youth. "It's in Montana, and you know a corner of the Park is in that State."
All had walked toward the automobile, which Mr. Porter had been running. The girls got in the tonneau and Dave climbed into the front seat beside his uncle. Just as they were about to start, Nat Poole walked past, suit-case in hand, and tipped his hat politely. Both girls smiled and bowed and Mr. Porter nodded. Then the touring-car rolled off in the direction of the big Wadsworth mansion, where, as I have before stated,
