them to our side, pass them along the crevice and shelf, and
bridge over the broken place. Then we go on to a point over the falls,
but do not obtain a satisfactory view. So we climb out to the top of the
wall and walk along to find a point below the fall from which it can be
seen. From this point it seems possible to let down our boats with lines
to the head of the rapids, and then make a portage; so we return, row
down by the side of the cliff as far as we dare, and fasten one of the
boats to a rock. Then we let down another boat to the end of its line
beyond the first, and the third boat to the end of its line below the
second, which brings it to the head of the fall and under an overhanging
rock. Then the upper boat, in obedience to a signal, lets go; we pull in
the line and catch the nearest boat as it comes, and then the last. The
portage follows.

We go into camp early this afternoon at a place where it seems possible
to climb out, and the evening is spent in "making observations for
time."

_August 7.--_The almanac tells us that we are to have an eclipse of the
sun to-day; so Captain Powell and myself start early, taking our
instruments with us for the purpose of making observations on the
eclipse to determine our longitude. Arriving at the summit, after four
hours' hard climbing to attain 2,300 feet in height, we hurriedly
build a platform of rocks on which to place our instruments, and quietly
wait for the eclipse; but clouds come on and rain falls, and sun and
moon are obscured.

Much disappointed, we start on our return to camp, but it is late and
the clouds make the night very dark. We feel our way down among the
rocks with great care for two or three hours, making slow progress
indeed. At last we lose our way and dare proceed no farther. The rain
comes down in torrents and we can find no shelter. We can neither climb
up nor go down, and in the darkness dare not move about; so we sit and
"weather out" the night.

_August 8._--Daylight comes after a long, oh, how long! a night, and we
soon reach camp. After breakfast we start again, and make two portages
during the forenoon.

The limestone of this canyon is often polished, and makes a beautiful
marble. Sometimes the rocks are of many colors--white, gray, pink, and
purple, with saffron tints. It is with very great labor that we make
progress, meeting with many obstructions, running rapids, letting down
our boats with lines from rock to rock, and someti