At length we reached the watershed, from one side of which the streams ran down to Prince Regent's River, and from the other to the Glenelg; the rocks on the south side were ancient sandstone resting on basalt, and on the opposite the basalt crept out, forming elevated hills.

This position was remarkable both in a geological and geographical point of view; and, the sandstone range over against us looking rather more accessible than it had previously done, I determined to halt here for the night and examine the country; but my resolution was scarcely formed ere such heavy storms of rain, accompanied by thunder and lightning, came on as totally to prevent me from seeing to any distance or taking any bearings.
On entering the old red sandstone district again the parakeets became once more common, and the green ants reappeared.

These last seem to be solely confined to the sandstone, for I did not see one without its limits.
ASCENT OF THE SANDSTONE RANGE.
March 23.
This morning we made a more fortunate effort to ascend the sandstone range which had yesterday so baffled our efforts; and having commenced the ascent at 6 A.M.reached the summit at 10, but the poor little ponies were dreadfully exhausted.

Having now established ourselves upon this narrow elevated tableland the next thing was to descend on the other side.

The prospect to the southward and eastward was not very cheering, for before we could make any further progress in either of those directions we had a perfect precipice to get down, at the foot of which lay a beautiful and verdant valley about three miles wide, diversified with wood and water; whilst a large cascade which could be seen falling in a dark forest on the other side added much to the scenery.