At sunrise we were near two low islands, bearing South 12 degrees 22 minutes West, and South 20 degrees West, from which very extensive reefs were seen extending between the bearings of South and South-West by West. They were called Cockells Isles. We passed round their north end over a bottom of hard sand, mixed with shells, stones, and coral; in doing which we found an irregular depth, but as the water did not shoal to less than twelve fathoms our course was not altered. Soon after the sun appeared above the horizon the distant land was again enveloped in mist. At eight o'clock we ventured to steer more southerly, but continued to sound over a rocky bottom until ten o'clock, when the islands bore South-East; we then steered South-West through a muddy channel with the flood tide in our favour, towards some land that, as the mist partially cleared off, became visible as far as South-West 1/2 West; some islands were also seen bearing South-South-East; and at noon, being in latitude 15 degrees 50 minutes 39 seconds, we found ourselves off a bay, the east head of which was formed by several islands. The land at the back appeared to be of tolerable height but its outline was so level, that it did not present any prominent feature sufficiently defined to take a bearing of more than once; its coast appeared to be fronted by several rocky islands and to be very much intersected to the westward; either by straits or considerable openings. The continued hazy state of the weather prevented our ascertaining the particular feature of the country; it seemed to be rocky and very bare of vegetation; but they were some parts, particularly on one of the islands to the eastward at the entrance of Collier's Bay, where a few good-sized trees were growing over a sandy beach. The ebb tide after noon was against us, and the wind being light, we were making no progress. As sunset approached, we began to look for anchorage; but the suspicious nature of the bottom and the great depth of the water prevented our being successful until some time after dark; the anchor was at last dropped in twenty-eight fathoms, on a bottom of sandy mud, with the ebb-tide setting to the North-West, at the rate nearly of two knots. Several whales of that species called by whalers fin-backs were playing about us all day, and during the morning two or three were seen near the vessel lashing the water with their enormous fins and tails, and leaping at intervals out of the sea, which foamed around them for a considerable distance. After anchoring the wind was variable and light from the western quarter but during the night there was a heavy swell. The flood-tide, which commenced at nine o'clock, when the depth was twenty-eight fathoms, gradually ran stronger until midnight, when its rate was two miles per hour: high-water took place at 3 hours 15 minutes a.m., or at twelve minutes before the moon passed her meridian; the rise being thirty-six feet. August 18.