Cape Wellington, the eastern projection of the Promontory, forms the north point of Waterloo Bay, which is wide and spacious. These names were suggested by the fact that the day of our anchoring there was the anniversary of one of the greatest triumphs ever achieved by British arms. At the head of the bay, lies the low valley, three miles in length, which stretches across the promontory and forms a very conspicuous break in the high land. On the northern side of it, the highest hill, Mount Wilson, rises abruptly until its woody crest reaches an elevation of 2350 feet. On the southern, was a ridge strewn over with immense boulders of granite, one, near where I stood, measuring eighty feet in height, and resting with such apparent insecurity, that little seemed required to send it rolling and crashing into the valley below, along which a rivulet winds, and falls into the sea at the north end of a sandy beach, forming the head of Waterloo Bay. The depth in the middle of the latter is 12 fathoms, muddy bottom; it lies four miles from the south end of the Promontory, and there is no good anchorage between. SAIL FOR PORT DALRYMPLE. From a small flattened sugarloaf, forming the summit of Cape Wellington, I got an angle to the Crocodile Rock,* and with others from the south-west end of the Promontory, and from the ship on passing, I determined the position of this danger most satisfactorily. (*Footnote. This rock, in latitude 39 degrees 21 minutes 30 seconds South, and longitude 4 degrees 41 minutes 45 seconds West of Sydney, lies in a line midway between the western extremities of Curtis and Rodondo Islands, nearly nine miles from each. It is a smooth round-topped granite boulder, just protruding above the surface; and in fine weather the sea runs over it without breaking. The depth being 43 fathoms close to it, if the waters of the Strait were drawn off the shape of it would be that of a column nearly 260 feet high.) As we had not, as I expected, met the Vansittart, I was anxious to learn something of her, and crossing over to the south side of the Strait, for the purpose, entered Port Dalrymple, where I found that Mr. Forsyth and his party had preceded our arrival by a day or two. The Vansittart's employment had been the examination of the north-east extreme of Tasmania, some portions of which were found to be nine miles out in latitude; the greater part was fronted with kelp and rocky patches. The work, also, included a portion of Banks' Strait, and the southern part of the western side of Flinders Island, among the islets fronting which were discovered several good anchorages: the best in westerly winds being under Goose or Western Chappell Island, where a lighthouse was in course of construction. YORK TOWN.