June. 18.--As we were on the point of setting forward, a large party of natives made their appearance on the opposite side of the river: they set up a most hideous and discordant noise, making signs, as well as we could understand them, for us to depart and go down the river. After beating their spears and waddies together for about a quarter of an hour, accompanied by no friendly gestures, they went away up the river, while we pursued our course in an opposite direction. We had hitherto met with no obstructions in the navigation, except such as arose from the wrecks of successive floods lodging in the narrows; these were easily overcome: the course of the river to-day for nearly six miles was a fine and even stream, from forty to fifty yards wide, and from eight to sixteen feet deep, over a bottom of rock and sandy gravel; when a reef of rocks at once interrupted our progress in the laden boats, the water breaking with such violence over them, that I was afraid they would be greatly endangered even when light. The horses had stopped at a cataract about three quarters of a mile lower down, and it appeared that the rocky shoal extended to that distance, when a fall of five feet over a bed of rocks would have stopped the boats altogether. The horses were immediately unladen and sent to bring the cargos of the two boats, which being accomplished, we got them safely over the shoals by the cataracts; when hauling them over land about two hundred yards, they were again launched into deep water. The country on either side during this days journey was by no means so good as it had hitherto generally been, being very brushy, and thickly timbered, chiefly with the species of eucalyptus called box, and another kind appearing to be different from those frequently observed. The banks of the river were very high; and, notwithstanding the country was perfectly level, it was far above the reach of any flood. The body of water falling over the cataract was surprising, the low state of the river being considered, and this incident instead of discouraging us increased our already sanguine hopes, that its termination would not deceive the expectations we could not avoid indulging.