t you have learned a good many things you did not know
before. Some things in here I didn't know before, myself."

"It's much pleasanter," said Rob, "to follow out a country on the ground
than it is to do it on the map. Not all maps are correct--except John's,
here! But no matter how good a map is, it never means anything to you
until you have followed it out on the ground. Just look here, for
instance, at the great crooked sweep of the Continental Divide. Yet here
we have crossed three passes over the Continental Divide within the last
three days--Red Rock, Raynolds, and Targhee--and the Targhee divides the
Madison, which is Atlantic water, from Henry's Lake, which is Pacific
water."

"Yes," nodded Uncle Dick. "There are not many more interesting
countries, geographically speaking, than this right where we are, at the
head of the great river. Lewis and Clark crossed the Rocky Mountain
Divide seven times, at six different places--up North there. They
crossed the Lemhi Pass, both of them. Then they crossed the Divide twice
more into the Bitter Roots, then crossed it again on the Lolo Trail.
Then they came back over that when they went East, and Lewis crossed the
pass over to the north, alone, and that ought to be called his pass. And
Clark came down to the Gallatin and crossed that pass alone to the
Yellowstone waters. Yet their names are on almost none of the great
passes and great rivers which they found. Soon they will have passed."

One more day of beautiful sport on the crystal stream that ran through
the beautiful valley, and the pleasant party of new-made friends met
around the camp fire for the last time.

"I have got to get back for my haying," said Chet, who had proved
himself a fine angler as well as a good companion.

"The same for me," added the young rancher from the head of the lake. So
it was agreed that on the next morning they should separate.

CHAPTER XXXII

AT BILLY'S RANCH

The blue smoke of their last camp fire on the South Fork rose almost
straight in the still air of a clear summer day as their party sat
around their last breakfast. Although not actually at the end of their
journey, they felt that now they were heading away from these
interesting scenes, so that a sort of sadness fell upon them.

"Cheer up, fellows!" said Billy Williams. "You are not out of scenery,
nor out of sport yet, by any means, if you want to stop for sport.
Besides, there is one other thing we haven't fin