We crossed the Myponga; and led our horses down a winding path on the almost precipitous side of Mount Terrible, well worthy its name, just as the sun was shedding his last rays over the waters of the Gulf, that stretched away westward, apparently, from our feet; the white sails of a coaster here and there dotting the blue expanse. Hitherto the road had been over a succession of hills and dales, with occasionally a patch of pretty scenery; but from the foot of Mount Terrible a level, lightly-timbered piece of country extended to the Unkaparinga, which we crossed, passing through the township of Noarlinga, on its north bank. After stopping to bait the horses, we continued our ride; but it was now so very dark that I lost all the beauty of this part of the country, and from the undulations in the road I could easily imagine that many a pretty glen was veiled from us by the darkness. Getting off the track, we became entangled among some high five-railed fences, from which we were extricated by the sagacity of my horse, belonging to the mounted police; on being given his head, he soon brought us back upon the road to Adelaide, where we arrived about midnight, having ridden, since 10 A.M., nearly ninety miles. We had scarcely reached the town before a hot wind set in, which lasted forty-eight hours, when a squall from seaward relieved the gasping inhabitants: at one time the thermometer at the public offices was 158 degrees. SAIL FROM SOUTH AUSTRALIA. We sailed from South Australia on February 7th, but it was not until the forenoon of the 9th that we cleared Backstairs Passage, passing half a mile from the reef fronting the east end of Kangaroo Island, in 16 fathoms; the south-eastern part of this island is a steep rocky shore, with few sinuosities. Southerly winds brought us in sight of the land at daylight on the 11th. The most remarkable features were Mounts Gambier and Schanck; the summit of the latter, the least conspicuous, is flat, with a hollow in the centre. According to my observations, it is in longitude 10 degrees 29 minutes West of Sydney. The ship's position, just before dark, was ten miles North 65 degrees West from Cape Bridgewater, which is a hummocky cliff-faced point of land, separated from the main by a low neck. ARRIVE AT PORTLAND BAY. February 12. Finding ourselves still off this part of the coast, which was laid down three miles too much to the northward, I resolved, for the better means of determining this fact by observations on shore, to go to the nearest anchorage, Portland Bay, where we arrived in the evening. I had another object in visiting this place, namely, that of helping to determine the 141st meridian, which had been fixed on as the western boundary of the colony of New South Wales. The approach to this anchorage is remarkable, and cannot escape the memory of anyone who has seen it; for the information of those who have not, I give a woodcut.*