May 5.
The next day the cutter was anchored within a mile and a half of the south point of a considerable opening, which the boats were prepared to examine.
May 6.
And at daybreak we commenced its exploration, but the greater part of the tide was expended before we reached the entrance, which is fronted by a bank of mud on which there was not more than twelve feet water; the depth, however, increased after we entered the river to four and five fathoms; and as we proceeded up we found the channel to be seven and eight fathoms deep. The banks on either side were very low; they were composed of a soft mud, and so thickly lined with mangroves as to prevent our landing until we had pulled up for seven or eight miles. At ten o'clock the flood ceased and the ebb, setting with considerable strength, prevented our proceeding higher up: here we landed, and after spending some time in taking bearings and examining the country, we returned to the cutter, which we reached early in the afternoon.
The banks where we landed were about two hundred yards apart, but were so low and without a hillock to ascend or a tree to climb to enable us to obtain a view of the country, that we could form but a very slight opinion of the place. A sugar-loaf-shaped hill, which was also visible from the anchorage, bore South 80 degrees East; at the distance of a league was a rocky hill that bore North 88 1/4 degrees East; and, five or six leagues off, was a range of hills extending from East by South to South 27 degrees East. In all other directions the eye wandered over a dreary, low, and uninterruptedly flat country; which in most parts is covered with an arundinaceous grass.
The mangrove bushes on the banks of the river, which was quite salt, were crowded with the nests of an egret, in which the young birds were nearly fledged. Hawks, wild ducks, pelicans, and pigeons, were also abundant, and an immense flight of white cockatoos hovered over the mangroves, and quite disturbed the air with their hideous screamings. A small black water-bird, about the size of a pigeon, with a white neck and a black ring round it, was observed, but not near enough to enable us to ascertain its species. On our course up and down the river we encountered several very large alligators, and some were noticed sleeping on the mud. This was the first time we had seen these animals, excepting that at Goulburn Island, and, as they appeared to be very numerous and large, it was not thought safe to stop all night up the river, which we must have done had we remained for the next flood-tide.
No inhabitants were seen, but the fires that were burning in all directions proved that they could not be far off.
May 7.
The next morning we were underweigh and steering along the coast to the westward towards a low but extensive island; and, as we approached, we found that it fronted a very considerable opening in the land, extending into the interior under the eastern base of Mount Hooper. The channel between the island and the main appearing clear, we did not hesitate to pass through, and within half a mile of the island, where the channel was evidently the deepest, we sounded in eight and nine fathoms. As soon as we entered the opening it assumed a similar appearance to that of the river we examined yesterday, but it was very much more considerable and excited very sanguine hopes in our minds. Besides the low island above-mentioned there is another of smaller size between it and the west point of entrance; so that there are three entrances. The islands were called Barron and Field Islands, after my friend, then presiding as Judge of the Supreme Court of New South Wales.
As we proceeded, the depth continued to be so even, and to shoal so gradually, that we ran up it for six miles, when, as it was near noon, we anchored and landed on the eastern bank, to observe the sun's meridional altitude; but, from the muddy state of the banks, we had great difficulty in reaching the shore. On returning to the vessel, we sailed further up, and, at high water anchored near the end of the first reach, and made preparations for its further investigation. The tide then began to ebb at the rate of three miles per hour, and continued with nearly that velocity during the whole tide. During the evening our preparations were completed.