In the evening we ascended a hill near the anchorage; whence a favourable view was obtained for the construction of my chart. The space behind the beach to the foot of the hill is occupied by a level plain that has evidently been formed by the deposition of alluvial soil; over which, in many places, the last night's high tide had passed; but those parts which it had not reached were covered with a thin layer of salt which at a distance exactly resembled hoar-frost. Upon it was observed the track of a dog that had evidently been running towards the saltwater pits to quench its thirst; and this, I fear, is only a proof of the total absence of fresh water, which, indeed, the desolate and burnt up appearance of everything around was sufficient of itself to bespeak. The country at the bottom of the gulf appeared to be of a rugged and mountainous character: the hills were observed in detached ranges to rise abruptly from a low level plain extending to the shore, the edge of which was lined as far as we could see by a belt of mangrove bushes. These plains were covered with salt incrustations over which were scattered the stems and branches of trees that had evidently been washed down from the hills and deposited there by inundations to which this country appears to be frequently subject. The trees appeared to be of so much larger size than any we have seen growing near the coast that we reasonably concluded the interior to be of a much more productive character than the country in the vicinity of the sea. Our means were however too confined to satisfy ourselves of this interesting fact. September 23. The following morning, the weather being more favourable, we left the bay and, with the remainder of the flood tide, beat through the narrows; in which, at one cast, we had no bottom at forty-five fathoms. As soon as we passed this strait we entered the basin and a little before high water anchored in eight fathoms on its west side, where at noon, by a meridional observation to the south, the latitude was found to be 15 degrees 21 minutes 53 seconds South. After this we landed in the vicinity of our station; but, finding the country as barren and dreary as before, the evening was spent in sounding between the cutter and the western shore. September 24. The next morning we reached the farther end of the basin and anchored under a remarkable range of hills; which, from their appearance, were called the Bastion Hills; the latitude of this station is 15 degrees 29 minutes 38 seconds South. The gulf, which had now assumed the character of a river, trended to the South-West, and at the distance of three or four miles disappeared among some high land in that direction.