The next afternoon a westerly wind brought us again in with the land; and in the evening we tacked in six fathoms, three miles and a half to the northward of Thevenard Island, which we found to be connected with a reef we discovered in the morning, lying eleven miles North by East from it; inside this reef the water looked deep and smooth. The island is a narrow strip lying east and west, about three miles; the west end we made in latitude 21 degrees 26 minutes South and longitude 114 degrees 54 minutes East. From the number of islands I saw to the south of Thevenard, I think the reef continues to Maison Island, near the North-west Cape. The outer one, seen from the Beagle, is in latitude 21 degrees 31 minutes South and longitude 114 degrees 42 minutes East. I myself believe the whole extent from Maison to Barrow's Island is occupied by islets and reefs, probably all connected. We know, in fact, from Captain King, that a reef extends sixteen miles off the south end of Barrow's Island. RESULT OF SOUNDINGS. Seventeen miles in a North-West by North direction from Thevenard Island we had 65 fathoms, fine white sand, having deepened gradually from six fathoms three miles north of it. In June of this year, working to the North-East we had 68 fathoms three miles West by South of that position, and 111 fathoms six miles North-West of it; beyond this no bottom was found with 120 and 150 fathoms.* (*Footnote. The following table is the result of other outer soundings obtained in the Beagle, showing how far the bank of soundings extends off the Western coast of Australia. COLUMN 1: LATITUDE SOUTH (DEGREES, MINUTES). COLUMN 2: DEPTH IN FATHOMS. COLUMN 3: QUALITY OF BOTTOM. COLUMN 4: DISTANCE FROM NEAREST LAND. 32 02 : 70 : Fine white sand and rock : Rottnest or Garden Island 20 miles. 30 55 : 86 : Fine grey sand : Main abreast 34 miles. 29 38 : 127 : Fine grey sand : Main abreast 39 miles. 26 42 : 187 : Fine grey sand : South point of Shark's Bay 37 miles. 21 14 : 111 : Fine white sand : Thevenard Island 25 miles. 20 00 : 150 : Fine white sand : Tremouille Island 35 miles. It would thus appear that a ship in less than 110 fathoms off the west shore of the continent would be within forty miles of the land; and nearly the same distance from the islands fronting it, when in about 200 fathoms between the latitudes of 19 degrees 50 minutes South and 20 degrees 10 minutes South. The bank of soundings extends further off the North-west coast, as eighty-five miles north of Depuch Island we had only 75 fathoms, fine white sand. In a south direction from that position the water shoaled rapidly to 40 fathoms in fifteen miles; but very gradually afterwards to 15 fathoms in fifty miles. This slope of the bank was determined by several boards in working to the westward.) RETURN TO SWAN RIVER.