Mr. Austin’s small party of horses in November, 1854, is now yielding a pasture nearly equal to the average of the Champion Bay district, and in some parts most luxuriant, the grass having scarcely arrived at maturity was perfectly green; this remarkable change in the character of the country is, I am inclined to think, not entirely confined to this year in particular, but that from meteorological causes this district has not unfrequently the benefit of tropical rains falling during the months of January and February, although not always in sufficient quantity to cause the river to flow as low as the settled districts.

It has already been observed by many persons that during the summer months the prevailing sea breezes divide the northerly currents of vapour about 100 miles inland from the west coast, preventing the rain from falling throughout the same parallel of latitude.

As near the eastern limits 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.

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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