HOUTMAN'S ABROLHOS. The old Dutch charts give a very considerable extent to this reef; Van Keulen makes it cover a space of sea, forty-seven miles long, and twenty-five broad. We only saw the islands at the south end, with three detached reefs between them and the shore; one of which (the southernmost) may probably be the TURTLE DOVE. The islands lie West 4 degrees North true, forty-one miles from Cape Burney, but the channel (GEELVINK CHANNEL) between the shore and the reefs, is not more than twenty-six miles wide. The south-easternmost reef that we saw is about three miles long, and lies nearly ten miles South 55 degrees East from the islands; it appeared to be covered, but the sea was breaking high over it. In passing this part of the coast, Captain Hamelin, who commanded the Naturaliste under Commodore Baudin's orders, must have steered within the reefs, as the Geelvink (Vlaming's ship) did. The reef that is laid down upon the chart, in latitude 29 degrees 10 minutes is from Van Keulen. We did not see it. (See Horsburgh volume 1 page 98.) From Cape Burney the coast is rather low and sandy; in 29 degrees 16 minutes is a reef; and seven miles more to the south is another; they lie from five to seven miles from the shore. In latitude 29 degrees 6 minutes 30 seconds, there is a small peaked hillock; and in 29 degrees 17 minutes 50 seconds, a small sandy patch upon the land. Between latitudes 29 degrees 25 minutes and 29 degrees 55 minutes, we did not see the coast, having passed it in the night. It is laid down from Van Keulen's chart. Hence to Island Point, which is low and rocky, the shore is lined with reefs, extending off shore for two to four miles. At the back of this, and at about eight miles from the coast, is a rocky range, of three leagues in length, on which are MOUNTS PERON and LESUEUR. To the south of ISLAND POINT, are two bays fronted by reefs; the southernmost, JURIEN BAY, has three or more small islets in it. The coast to the south of the bay is sandy. In latitude 30 degrees 37 minutes, are three small rocky lumps, very remarkably placed; the middle one is in latitude 30 degrees 37 minutes 40 seconds: fourteen miles to the south of these are two others, the north-easternmost is in latitude 30 degrees 51 minutes 50 seconds, they are very conspicuously placed upon a ridge of bare white sand. Hence the coast winds to the South-South-East for eighty miles as far as the entrance of Swan River. The coast is low and slightly wooded, and lined with reefs, that in some places extend for two miles from the shore. Off CAPE LESCHENAULT (in latitude 31 degrees 21 minutes) is a reef, lying six miles and a half from the shore; it appeared to be connected with the rocks that line the coast. The following account of SWAN RIVER is taken from Captain De Freycinet's account of Baudin's voyage (page 175 et seq).