On the 17th, we again commenced pulling, the wind being at north, and contrary. It did not, however, remain in that quarter long, but backed at noon to the S.W., so that we were enabled to make a good day's journey, and rather gained than lost ground.

REMARKABLE CLIFF—GEOLOGICAL REMARKS.

Having left the undulating hills, at the mouth of the valley behind us, we passed cliff after cliff of fossil formation: they had a uniform appearance as to the substance of which they were composed, and varied but little in colour. Having already examined them, we thought it unnecessary to give them any further special attention, since it was improbable we should find anything new. In turning an angle of the river, however, a broad reach stretched away before us. An alluvial flat extended to our left, and a high line of cliffs, that differed in no visible respect from those we had already passed, rose over the opposite side of the river. The cliffs faced the W.N.W., and as the sun declined, his beams struck full upon them. As we shot past, we were quite dazzled with the burst of light that flashed upon us, and which gave to the whole face of the cliff the appearance of a splendid mirror. The effect was of course momentary; for as soon as we had passed the angle of refraction, there was nothing unusual in its appearance. On a nearer approach, however, it appeared again as if studded with stars. We had already determined on examining it more closely, and this second peculiarity still further excited our curiosity. On landing, we found the whole cliff to be a mass of selenite, in which the various shells already noticed were plentifully embedded, as in ice. The features of the cliff differed from any we had previously remarked. Large masses, or blocks of square or oblong shape, had fallen to its base, and its surface was hard, whereas the face of the majority of the other cliffs was soft from the effect of the atmosphere; and the rock was entirely free from every other substance, excepting the shells of which it was composed. We of course collected some good specimens, although they added very considerably to the weight of our cargo.

The morning of the 18th was calm and cloudless. The wind, of which there was but little, came from the north, and was as usual warm. We availed ourselves of a favourable spot to haul our boat on shore under one of the cliffs upon the proper left of the river, and cleaned her well both inside and out.

LABORIOUS ASCENT OF THE BOAT.

The breezes that had so much assisted as from the lake upwards, had now lost their influence, or failed to reach to the distance we had gained. Calms succeeded them, and obliged us to labour continually at the oars. We lost ground fast, and it was astonishing to remark how soon the men's spirits drooped again under their first efforts. They fancied the boat pulled heavily, and that her bottom was foul; but such was not the case. The current was not so strong as when we passed down, since the river had evidently fallen more than a foot, and was so shallow in several places, that we were obliged to haul the boat over them. On these occasions we were necessarily obliged to get out of her into the water, and had afterwards to sit still and to allow the sun to dry our clothes upon us. The unemployed consequently envied those at the oars, as they sat shivering in their dripping clothes. I was aware that it was more from imagination than reality, that the men fancied the boat was unusually heavy, but I hesitated not in humouring them, and rather entered into their ideas than otherwise, and endeavoured to persuade them that she pulled the lighter for the cleaning we gave her.

A tribe of natives joined us, and we had the additional trouble of guarding our stores. They were, however, very quiet, and as we had broken up our casks, on leaving the coast, we were enabled to be liberal in our presents of iron hoop, which they eagerly received. We calculated that we should reach the principal junction in about fifteen days from this place.

NATIVE BURIAL-PLACE.

The natives left us to pursue our solitary journey as soon as the boat was reloaded. Not one of them had the curiosity to follow us, nor did they appear to think it necessary that we should be attended by envoys. We stopped for the night upon the left bank; and close to a burial-ground that differed from any I had ever seen. It must have been used many years, from the number of bones that were found in the bank, but there were no other indications of such a place either by mounds or by marks on the trees. The fact, therefore, is a singular one. I have thought that some battle might have been fought near the place, but I can hardly think one of their battles could have been so destructive.

IMPEDED BY SHOALS.