ith no more great falls or rapids.
Still, we run cautiously, and stop, from time to time, to examine some
places which look bad. Yet, we make ten miles this afternoon; twenty
miles, in all, to-day.

_August 22._ We come to rapids again, this morning, and are occupied
several hours in passing them, letting the boats down, from rock to
rock, with lines, for nearly half a mile, and then have to make a long
portage. While the men are engaged in this, I climb the wall on the
northeast, to a height of about 2,500 feet, where I can obtain a good
view of a long stretch of canon below. Its course is to the southwest.
The walls seem to rise very abruptly, for 2,500 or 3,000 feet, and then
there is a gently sloping terrace, on each side, for two or three miles,
and again we find cliffs, 1,500 or 2,000 feet high. From the brink of
these the plateau stretches back to the north and south, for a long
distance. Away down the canon, on the right wall, I can see a group of
mountains, some of which appear to stand on the brink of the canon. The
effect of the terrace is to give the appearance of a narrow, winding
valley, with high walls on either side, and a deep, dark, meandering
gorge down its middle. It is impossible, from this point of view, to
determine whether we have granite at the bottom or not; but, from
geological considerations, I conclude that we shall have marble walls
below.

After my return to the boats, we run another mile and camp for the
night.

We have made but little over seven miles to-day, and a part of our flour
has been soaked in the river again.

_August 23._ Our way to-day is again through marble walls. Now and then
we pass, for a short distance, through patches of granite, like hills
thrust up into the limestone. At one of these places we have to make
another portage, and, taking advantage of the delay, I go up a little
stream to the north, wading it all the way, sometimes having to take a
plunge in to my neck; in other places being compelled to swim across
little basins that have been excavated at the foot of the falls. Along
its course are many cascades and springs, gushing out from the rocks on
either side. Sometimes a cottonwood tree grows over the water. I come to
one beautiful fall, of more than a hundred and fifty feet, and climb
around it to the right, on the broken rocks. Still going up, I find the
canon narrowing very much, being but fifteen or twenty feet wide; yet
the walls rise on either side ma