ia that the range of mountains between St. Vincent's Gulf
and the Murray river runs up northwards into the interior. In like manner
the ranges crossed by the Expedition also ran in the same direction. The
Black Rock Hill, so named by Captain Frome, is in lat. 32 degrees 45
minutes and in the 139th meridian, and is the easternmost of the chain to
which it belongs. Mount Gipps on the Coonbaralba range is in lat. 31
degrees 52 minutes and in long. 141 degrees 41 minutes, but from that
point the ranges trend somewhat to the westward of south, and
consequently, may run nearer to that (of which the Black Rock Hill forms
so prominent a feature) than we may suppose, but there is a distance of
nearly 150 miles of country still remaining to be explored, before this
point can be decided. Nevertheless, it is more than probable the two
chains are in some measure connected, especially as they greatly resemble
each other in their classification. They are for the most part composed
of primary igneous rocks, amongst which there is a general distribution
of iron, and perhaps of other metals. The iron ore, however, that was
discovered during the progress of the Expedition, of which Piesse's Knob
is a remarkable specimen, was of the purest kind.

It was, as has been found in South Australia, a surface deposit,
protruding or cropping out of the ground in immense clean blocks. This
ore was highly magnetic; the veins of the metal run north and south, the
direction of the ranges, as did a similar crop on the plains at the S.E.
base of the ranges. Generally speaking there was nothing bold or
picturesque in the scenery of the Barrier Range, but the Rocky Glen and
some few others of a similar description were exceptions. As the Barrier
Range ran parallel to the coast ranges, so there were other ranges to the
eastward of the Barrier Range, running parallel to it, and they were
separated by broad plains, partly open and partly covered with brush. The
general elevation of the ranges was about 1200 feet above the level of
the sea, but some of the hills exceeded 1600. Mount Lyell was 2000; Mount
Gipps 1500; Lewis's Hill 1000: but the general elevation of the range
might be rather under than over what I have stated. It appears to me that
the whole of the geological formation of this portion of the continent is
the same, and that all the lines of ranges terminate in the same kind of
way to the north, that is to say, in detached flat-topped hills of
compa