o face the music, and also helped to clear up what had been a
great mystery. Then all the boys graduated from Oak Hall, Dave receiving
high honors.

It is needless to say that our hero at that time was one of the happiest
boys in the world. His folks and Jessie Wadsworth came to the
graduation, which was celebrated with big bonfires, music by a band, and
refreshments in the gymnasium.

Dave had promised Roger Morr that he would pay the Senator's son a
visit. He did so, along with Phil and some others, and on that occasion
heard about a gold mine which had been willed to Mrs. Morr, and which
had been completely swallowed up by a landslide. Numerous searches had
been made for this lost mine, but up to that time without result.

"Let us go in search of the lost mine," Dave had said. And how he and
Roger and some of the others made the trip to the West and went on a
hunt for the mine has been told in detail in the volume entitled "Dave
Porter in the Gold Fields."

While the lads were on this quest, they again fell in with Link Merwell,
who with Job Haskers, a former teacher at Oak Hall, was also trying to
locate the lost mine. The two parties had many adventures, and when at
last the missing mine was relocated, there came another landslide which
nearly cost Dave and his friends their lives. When they finally reached
a place of safety they were joined by a man from the other party who had
suffered severely, and who told them that Link Merwell and Job Haskers,
as well as a third person of the party, had been swept away to their
death. Later on Dave and his friends had looked for the missing persons,
but had been unable to locate them.

The finding of the Landslide Mine, as it was called, had been of great
financial benefit to the Morr family, and they had been so pleased that
they had given Dave and some of the others a share in the holding. In
the meanwhile our hero and his chums, along with their friends, had
finished their outing in the West by a grand tour through Yellowstone
Park, on which they were accompanied by Dave's sister, Jessie and Belle,
and some others.

"Now you fellows have got to come on a little trip with me," Phil had
said, after coming East, and had explained that a small steamer
belonging to his father was then tied up at Philadelphia, getting ready
for a trip to Portland, Maine, and back.

"That will be fine," Dave had answered; and a little later a party had
been made up, including Phil, Dave,