s of my route the Murchison throws off two
branches nearly equal in magnitude to the main stream, I am induced to
imagine that its extreme source does not lie more than sixty or seventy
miles beyond that point, and had it not been that I did not feel
justified in abstracting so large a portion of time from the regular
surveys of this district, there is no doubt but that I could with every
facility have completed the exploration of the country as far as the
Gascoyne in two or three weeks.

On comparing the tracing of the Murchison, which I now enclose, with Mr.
Austin's route, it will be observed that there is a difference of
seventeen miles in latitude, and something more in longitude throughout
the eastern portion, a discrepancy which I am at a loss to account for,
as my dead-reckoning to both the outward and inward track agree well with
my cross-bearings; my latitudes were, however, taken only with a pocket
sextant with a treacle horizon, and might therefore not be implicitly
relied on. I have, however, preferred plotting my route exactly as booked
in the field, leaving the existing error to be cleared up at some future
period.

...

From Mr. Trigg, who arrived on Wednesday by the Preston from Champion
Bay, we have gathered the following additional particulars:--

The outward route was on the south bank of the river Murchison; the first
sixty miles was but indifferent, but there were many spots of grass,
sufficient to maintain travelling herds or flocks; afterwards the soil on
the banks of the river improved and were continuously grassy, the general
width being about half a mile. About latitude 26 degrees 50 minutes,
longitude 116 degrees east, two large branches, almost if not quite equal
to the main stream, join the Murchison from the eastward. About Mr.
Austin's Mount Welcome the grass was found very luxuriant--from two to
three feet high, and between there and Mount Murchison the country is
described by Mr. Trigg to be very beautiful, and the soil superior to any
he had previously seen in the colony, and equal to the best land in
Victoria. Mount Murchison itself is an immense mass of quartz with
granite round the base; this differs from Mr. Austin's description, but
that gentleman does not appear to have ascended the hill. From the summit
three high lands were observable, one an isolated peak fifty miles east,
the others to the north and north-east apparently more distant; so far as
could be seen, the country