We reached the mouth before daylight on the 6th. This was the coldest morning we had experienced; the thermometer being at 51 degrees with a strong breeze from South-South-East, which rendered somewhat dangerous the task of collecting the requisite soundings on the bar at the mouth; the gig being once or twice nearly half filled in doing so. Behind the eastern entrance point, was seen a large light-coloured kangaroo, which, for want of a better, afforded us a name. Our observations refer to this spot, Kangaroo Point, which they place in latitude 17 degrees 35 minutes 10 seconds South and longitude 7 degrees 35 minutes 50 seconds East of Port Essington. Instead of the usual mangrove shore, the coast to the eastward was sandy; but the most remarkable feature, hereabouts, is a clump of tall mangroves, towering over their fellow evergreens, close to the western entrance point. They are called in the chart the High Trees of Flinders, having been noticed by that celebrated navigator whilst passing at a distance from the coast. Bearing South-West 1/2 South they guide a ship to the bar, which can only be taken at high-water springs, when the depth averages eleven feet.* When the eastern part of this clump of trees bears South 45 degrees West, and Kangaroo Point South 10 degrees West the bar will have been passed, and the depth, at the same time of tide, will be seventeen feet; when the bearing of Kangaroo Point, given, leads up the channel, which deepens in a quarter of a mile to twenty-three and soon after to thirty feet. The impetus given to the water, from the first reach of the Albert, being straight, forces a channel of two miles in extent; with a width of nearly a quarter of a mile, growing gradually shallower towards the outer part, and, ultimately, becoming lost in the great flat fronting the shore, which is thrown out in proportion to the length of the channel, beyond which the bar extends for above a mile. Part of its inner side, however, is intersected by a narrow channel of thirteen and seventeen feet; the guide through which, is the eastern edge of the clump of trees before mentioned, bearing South 45 degrees West. The Albert is navigable, for vessels of a draught suited to the bar, thirteen miles; and within five of where the water is fresh. (*Footnote. The tides in the head of the Gulf of Carpentaria appear to be a compound of many others, obliterating the common daily difference, and producing only one tide in 24 hours. The direction of the flood stream commences at South-South-East, changing gradually to South-South-West as it terminates; that of the ebb changes from North-West to North-North-East. The strength of each is from a quarter to one knot. The rise at springs is from 9 to 12 feet, and at neaps from 3 to 8 feet.)