"I reckon we'd all like to go," cried the others, in concert.
"Well, there is just this much about it," returned Dave. "Anybody who has the price can go on that personally-conducted tour to Yellowstone Park, and, so far as I am concerned, you can go from there into the mountains and look for the mine."
"Why, of course!" burst out Roger. "If any of you want to go, just say the word."
This brought on a discussion lasting nearly an hour. In the end several of the lads said they would see what they could do, and would write about it later, or telegraph.
"Say, but wouldn't it be grand if we could locate that lost mine!" cried Phil, enthusiastically.
"Well, we'll have a try at it," returned Dave.
At last came the time for Dave to leave. Some of the others had already gone. Roger drove his chum down to the railroad station in the runabout. The two were alone. Dave noticed that the senator's son seemed unusually thoughtful.
"What's up, Roger?" he asked, at last. "You don't seem quite like yourself."
"Oh, I don't know that I ought to say anything, Dave," was the hesitating answer.
"If there is anything I can do——"