the DeGrey, possibly backed up by freshes from the interior which would, from a river of this size, occasion a considerable commotion where the tide amounts to twenty feet; at any rate, I could not observe any rocks, and there appeared to be a channel with at least five or six feet of water in it at low tide.  For the first mile the river has a breadth of from 400 to 800 yards, and would admit with the tide vessels of twelve or fourteen feet draft of water with perfect safety up as far as Ripon Island, where they could lie completely sheltered in all weathers quite close to the shore, which here has steep banks twenty to thirty feet high; they would however, be left aground at low water, as we did not observe any pools in this part of the river.  I had only just time to complete my observations when the roaring of the incoming tide warned me that no time was to be lost in returning to the horses, which were nearly a mile higher up the river.  Although I ran part of the way, the mud creeks filled up so rapidly, there was some risk of my being cut off from the shore and having to take up a roost on the top of the mangroves until the tide fell; I had time, however, to observe that the head of the tide carried with it thousands of fish of great variety, amongst them a very remarkable one from three to six inches in length, in form resembling a mullet, but with fins like a flying-fish; it is amphibious, landing on the mud and running with the speed of a lizard, and when frightened can jump five or six feet at a bound; I did not, however, succeed in capturing one for a specimen.  Swarms of beautiful bright-crimson crabs, about two inches diameter, were to be seen issuing from their holes to welcome the coming flood, on which was borne a great number of sea-fowl, who, it was evident, came in for an abundant feast in the general turmoil.  Mounting our horses, that had stood for the last two hours without touching a mouthful of the rank grass around them for want of water, we returned to the camp by a different route, through open grass flats bordering the deep reaches of water that encompass the north-west side of Ripon Island.

Scarcity of water near the west.

27th September.

Accompanied by the same party, but with three fresh horses, we again started to explore the plains eastwards towards Mount Blaze.  For several miles after leaving the island the country continued of the same fertile character as that passed over yesterday, and is at times subject to inundation from the river; but as we receded from the influence of the floods the soil became lighter and the grass thinner, with patches of triodia and samphire.  At twelve miles we entered a patch of open grassy forest, extending for some miles; but as there was no promise of obtaining water, and the day was calm and sultry, we turned to the northward in the hope that water might be procurable under the low sand-hills that line this portion of