The tracks of these lingering small glaciers are far more easily traced and their records more easily read, than those of the greater but more ancient glacier of which they were once but the tributaries.
Of the two summit ridges mentioned above the western is the higher.

It bears the most snow _now_, and in glacial times gave origin to the grandest glaciers.

Again: the peaks on both these summits rise higher and higher as we go toward the upper or southern end of the Lake.

Hence the largest glaciers ran into the Lake at its _southwestern end_.
And, since the mountain slopes here are toward the northeast and therefore the shadiest and coolest, here also the glaciers have had the greatest vitality and lived the longest, and have, therefore, left the plainest records.

Doubtless, careful examination would discover the pathways of glaciers running into the Lake from the eastern summit also; but I failed to detect any very clear traces of such, either on the eastern or on the northern portion of the western side of the Lake; while between the southwestern end and Sugar Pine Point, a distance of only eight or ten miles, I saw distinctly the pathways of five or six.