There is no other safe passage into the bay than that between the islands in the entrance and Cape Grey; which cape is remarkable for the round hummock on its extremity, and lies in latitude 13 deg. 1’ south, and longitude 136 deg. 42’ east.  The western branch of the bay appeared to be shallow, and not well sheltered, so that I did not go up it to sound; but in the eastern branch, which is near three miles wide, there is from 4 to 3 fathoms on blue mud, up to within three-quarters of a mile of a rocky point at the head; and the rocks of Point Alexander may there be nearly, if not altogether brought to shut on with those of Cape Grey.  Wood for fuel was plentiful every where, and there was no difficulty in procuring water from the ponds and holes in the low, sandy land near the shore of Point Alexander; but from May to December, I doubt whether they would not all be dried up, as well as the small streams which descended from Mount Caledon.  Our success with the seine was very moderate, more sea slugs, or what we called sea cucumbers from their shape, being brought on shore than fish; these differed from what we had seen on the reefs of the East Coast, in being of a more firm consistence, and of a light brown or grey, instead of a black colour:  when these slugs were pressed with the foot, they threw out a stream of water to some distance.

The country round Caledon Bay, especially at the heads of the two branches, is generally low land; Mount Caledon and the hills of the south side are of granite, and this stone is found in some other parts; but at Point Alexander the basis is a sand stone, more or less impregnated with iron, and at Point Middle it is almost iron ore.  A piece of this last stone carried the needle of the theodolite entirely round; yet the bearings taken from thence did not show any difference from those at Mount Caledon, and from those upon Point Alexander, taken from a hillock of sea sand, they did not differ more than half a degree.

So far as our examination went the soil is poor, being either sandy or stony, with a small mixture in some places of vegetable earth; notwithstanding which both the grass and wood were luxuriant, owing to the abundance of rain which had lately fallen, and to the warmth of the climate:  in the dry season, I should judge the country would be almost burnt up.  The casuarina was plentiful in the sandy places, and the eucalyptus amongst the rocks, where it reached a tolerable size; the wild nutmeg was found upon Point Middle, and there alone; our apple, the new species of eugenia, grew on Point Alexander and elsewhere, and also a few other plants bearing small fruits of little use.  Foot marks of the kangaroo were seen in different places, but none of the animals, nor indeed any quadruped; and birds seemed to be rare, both in the woods and on the shores.