"No, the landslide was too heavy and too far-reaching. The old miners told my father it was the biggest landslide known in Montana. One prospector said he thought the mine must now be a hundred feet or more underground." "Had your uncle worked it at all?" questioned Phil Lawrence. "Not much, but enough to learn that it was a valuable claim. It was in a district that had been visited by landslides before, and so he called it the Landslide Mine." "Well, your uncle could be thankful for one thing--that he wasn't in the mine when that big slide took place. But you said he died anyway." "Yes, of pneumonia, on the very day the slide took place. Wasn't it queer? Dad and mother went out to Butte, to the funeral--Uncle Maurice was an old bachelor--and then they heard his will read and learned about the mine." "And they couldn't get any trace at all, Roger?" asked Dave, as he stopped swinging in the hammock he occupied. "Nothing worth following up. One of the miners thought he had a landmark located, but, although he spent a good deal of money digging around, nothing came of it. You see that big landslide seemed to change the whole face of the country. It took down dirt and rocks, and trees and bushes, and sent them to new resting places." "Perhaps the mine was washed away instead of being covered up," suggested Phil. "No, all those who have visited the locality are agreed that the entrance to the claim must have been covered up." "Say! I'd like to hunt for that mine!" cried Dave Porter, enthusiastically. "So would I," returned Roger Morr, wistfully. "I know my mother would like to have somebody find it--just to learn if it is really as valuable as Uncle Maurice thought." "Well, if you two fellows go West to look for that mine you can count on having me with you," put in Phil Lawrence. "We were going to decide on what to do for the next two months. If Roger says the word----" "Oh, I could do that easily enough," said the senator's son. "But Dave wrote that he had something up his sleeve. Maybe his plans won't fit into this." "But they just will fit in!" cried Dave. "At least, I think they will," he added, more slowly. "You say this mine is located in Montana?" "Yes." "Well, that isn't very far from Yellowstone Park, is it?" "No--in fact a corner of the Park is in Montana." "Then, while the others were taking the trip through Yellowstone Park we could go out to that mining district and try to locate this missing mine," went on Dave, with a smile. "What are you talking about, Dave?" questioned his two chums, in a breath. "I'm talking about a personally-conducted tour of the Park that some folks in and around Crumville are getting up. Mr. Basswood, Ben's father, is at the head of it. It's a sort of church affair. They have got my folks interested, and my Uncle Dunston says he will go, and so will Laura, and Mrs. Wadsworth, and Jessie, and half a dozen others you know. They thought maybe we boys would want to go, too."