and having also crossed several fine
bold ridges with good streams between them, we at length encamped near a
round hill which, being clear on the summit, was therefore a favourable
station for the theodolite. This hill also consisted of granite and
commanded an open and extensive view over the country to the eastward.

September 25.

One bold range of forest land appeared before us and after crossing it we
passed over several rivulets falling northward, then over a ridge of
trappean conglomerate with embedded quartz pebbles, and descended into a
valley of the finest description. Grassy hills clear of timber appeared
beyond a stream also flowing northward. These hills consisted of old
vesicular lava. We next entered a forest of very large trees of ironbark
eucalyptus, and we finally encamped in a grassy valley in the midst of
this forest.

September 26.

We first crossed more hills of the trappean conglomerate on which grew
ironbark eucalypti and box. The rock consisted of a base of compact
felspar with embedded grains of quartz, giving to some parts the
character of conglomerate, and there were also embedded crystals of
common felspar. By diverging a little to the right we entered upon an
open tract of the most favourable aspect, stretching away to the
south-west among similar hills until they were lost in the extreme
distance. The whole surface was green as an emerald and on our right for
some miles ran a fine rivulet between steep grassy banks and over a bed
of trap-rock.

MAMMELOID HILLS.

At length this stream was joined by two others coming through similar
grassy valleys from the south; and when we approached two lofty smooth
round hills, green to their summits, the united streams flowed in an open
dell which our carts rolled through without meeting any impediment. I
ascended the most western of these hills as it was a point which I had
observed from various distant stations, and I enjoyed such a charming
view eastward from the summit as can but seldom fall to the lot of the
explorers of new countries. The surface presented the forms of pristine
beauty clothed in the hues of spring; and the shining verdure of these
smooth and symmetrical hills was relieved by the darker hues of the wood
with which they were interlaced; which exhibited every variety of tint,
from a dark brown in the foreground to a light blue in extreme distance.

LAVA, THE SURFACE ROCK.

The hills consisted entirely of lava and I named t