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