the upper part, or roof, is broken off. On this we walk for a short distance, slowly climbing all the way, until we reach a point where the shelf is broken off, and we can pass no farther. So we go back to the boat, cross the stream, and get some logs that have lodged in the rocks, bring 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." powell-canyons-153.jpg MARBLE CANYON. FROM THE GRAND TO THE LITTLE COLORADO. 237 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.