o that phase of their separate condition that they
presented toward the close of the glacial period after most of their
work was finished, and all the more telling features of the Valley and
the adjacent region were brought into relief.

The comparatively level, many-fountained Yosemite Creek Glacier was
about fourteen miles in length by four or five in width, and from five
hundred to a thousand feet deep. Its principal tributaries, drawing
their sources from the northern spurs of the Hoffman Range, at first
pursued a westerly course; then, uniting with each other, and a series
of short affluents from the western rim of the basin, the trunk thus
formed swept around to the southward in a magnificent curve, and poured
its ice over the north wall of Yosemite in cascades about two miles
wide. This broad and comparatively shallow glacier formed a sort of
crawling, wrinkled ice-cloud, that gradually became more regular in
shape and river-like as it grew older. Encircling peaks began to
overshadow its highest fountains, rock islets rose here and there amid
its ebbing currents, and its picturesque banks, adorned with domes and
round-backed ridges, extended in massive grandeur down to the brink of
the Yosemite walls.

In the meantime the chief Hoffman tributaries, slowly receding to the
shelter of the shadows covering their fountains, continued to live and
work independently, spreading soil, deepening lake-basins and giving
finishing touches to the sculpture in general. At length these also
vanished, and the whole basin is now full of light. Forests flourish
luxuriantly upon its ample moraines, lakes and meadows shine and bloom
amid its polished domes, and a thousand gardens adorn the banks of its
streams.

It is to the great width and even slope of the Yosemite Creek Glacier
that we owe the unrivaled height and sheerness of the Yosemite Falls.
For had the positions of the ice-fountains and the structure of the
rocks been such as to cause down-thrusting concentration of the Glacier
as it approached the Valley, then, instead of a high vertical fall we
should have had a long slanting cascade, which after all would perhaps
have been as beautiful and interesting, if we only had a mind to see
it so.

The short, comparatively swift-flowing Hoffman Glacier, whose fountains
extend along the south slopes of the Hoffman Range, offered a striking
contrast to the one just described. The erosive energy of the latter was
diffused over a