Reaching the base of the cliff at the side of the glacier, we ascended it without great difficulty, and came out upon the broad plateau of snow above. Thinking that the way onward would be easier along the steep snow-slope bordering the glacier, we made an effort to ascend in that direction, and spent two or three precious hours in trying to find a practicable route. Although the crevasses were fewer than on the glacier proper, yet they were of larger size and had but few bridges. At last we came to a wide gulf on the opposite side of which there was a perpendicular wall of snow a hundred feet high, and all further advance in that direction was stopped. Although obliged to turn back, our elevated position commanded a good view of the glacier below and enabled us to choose a way through the maze of crevasses crossing it. Descending, we plodded wearily on in an irregular zigzag course; but the crevasses became broader and deeper as we advanced, and at length we found ourselves traversing flat table-like blocks of snow, bounded on all sides by crevasses so deep that their bottoms were lost to view. We made our way from one snow-table to another by jumping the crevasses where they were narrowest, or by frail snow-bridges spanning the profound gulfs. Night came on while we were yet in this wild, broken region, and no choice was left us but to pitch our tent in the snow and wait until morning. The night was clear and cold, and a firm crust formed on the snow before morning. Although the temperature was uncomfortable, we were cheered by the prospects of a firm snow surface on the morrow. We continued our march at sunrise and found the walking easy; but the sun soon came out with unusual brilliancy and softened the snow so much that even the slowest movements were fatiguing. We endeavored to force our way up the center of the glacier through the crevasses and pinnacles of a second ice-fall; but after several hours of exhausting experience we were {149} obliged to change our plan, and endeavored to reach a mountain spur projecting from the western border of the glacier. The sunlight reflected from the snow was extremely brilliant, and the glare from every surface about us was painful to our eyes, already weakened by many days' travel over the white snow. Each member of the party was provided with colored glasses, but in traversing snow-bridges and jumping crevasses these had to be dispensed with. The result was that all of us were suffering more or less from snow-blindness.