27th November.
Steering east-south-east through grassy flats for one hour and a half, found that the river had turned to the northward round a steep hill, but continuing our course, crossed a low stony ridge and again approached the river, the banks of which were so steep that the horses could not get to the water, and therefore followed it two miles and encamped on a stony bar where the water was easy of access. The valley of the river is much contracted by the steep sandstone hills, which come close on both banks. In the bed of the river several fragments of jasper and black shale were found, the latter appearing to belong to the coal formation. A slight shower in the afternoon cooled the air, and the temperature was only 92 degrees at sunset, and the wet bulb 79 degrees.
Latitude by Achernar 15 degrees 36 minutes 29 seconds.
DEEP GORGE IN TABLELAND.
28th November.
Started at 6.15 a.m. and followed the river, which first came from the east, then south-east and south-west till 10.40, when we crossed to the right bank and halted. The valley of the river is much narrower, and does not exceed half a mile, and is bounded by cliffs of sandstone varying from 50 to 300 feet high. The waters of the river occasionally rise 100 feet, as the marks of the floods extended to the base of the cliffs; the regular channel of the river is about 200 feet wide, the water forming deep reaches often more than a mile long and separated by dry stony bars of shingle and rock. The sandstone is thicker here than towards Steep Head, but there is no change in the geological character, except that the chert-beds are not exposed. The tracks of several natives were observed, but they were not seen by us; at 2.0 p.m. resumed the journey up the river in a generally south direction, and at 4.30 encamped, but had great difficulty in forcing our way through the reeds to procure water.
Latitude by meridian altitude of a Persei 15 degrees 41 minutes 54 seconds.
29th November.
Left the camp at 6 a.m. and continued the route up the river to the south till 10.10, when we halted till 2.15 p.m., and then proceeded on till 4.45, and encamped at a small pool of rainwater, the bank of the river being so steep and covered with high reeds that the water is scarcely accessible. The valley of the river is still bounded by sandstone cliffs; but as the strata are horizontal, and the bed of the river rises, the shales are not much exposed, and the alluvial banks reach to the base of the cliffs, which are so continuous that I have not yet seen a spot where we could have ascended the tableland in which the valley is excavated. Several tributary gullies having passed, but none worthy of special notice. Fragments of trap-rock are frequent in the bed of the river, and one specimen contained traces of carbonate of copper; at 6.0 thermometer 92 degrees, aneroid 29.80, at the camp--sixty feet above the river.
Latitude by meridian altitude of Achernar 15 degrees 50 minutes 30 seconds.