With respect to the opening we had now left there were many conflicting opinions among us, but I have every reason to think that the land from Cape Leveque to Point Gantheaume is an island and that there is also a communication between Cygnet and Collier's Bays, behind the islands of the Archipelago, where it is also probable there is an opening trending to the south-east. The great rise and fall of the tides in the neighbourhood of Point Gantheaume gives a plausibility to this opinion; and the only thing that I know against it is the trifling depth of the water between that point and Cape Villaret. This however may be caused by the numerous banks and channels existing there, and which, of themselves alone, are indicative of the opening being something more than a mere bay. As sunset approached the eastern horizon was as usual in commotion; heavy dense clouds were collected, from which we had thunder and lightning. At seven o'clock the appearance was more threatening and, as a squall was evidently approaching, the sails were taken in and preparation made to meet it: soon after eight o'clock it passed rapidly over and brought a strong gust of wind, before which we were obliged to scud. After blowing most tempestuously for an hour the wind moderated, and the night passed without any repetition of it; we had however run five miles to leeward: had we been obliged to do this last night when underway in Cygnet Bay, or been drifted back this evening by the ebb-tide, we should have been very dangerously placed, from being surrounded by islands and blinded by the darkness of the night. Whilst this squall lasted the barometer was in no way affected, but the thermometer fell two degrees, having stood all the afternoon at 89 3/4 degrees. February 18. During the remainder of the night we stood off and on and experienced a current setting in the direction of North 52 degrees West one mile per hour. At eight o'clock the next morning (18th) Adele Island was seen; and in the afternoon we passed at a mile and a half from the western side of the reef which surrounds it. This island is low and sandy and covered with small bushes; it is about two or three miles in length; a dry sand extends for five miles from its south end, and as far as one mile from its north-west point; but the covered part of the reef is more extensive, and appeared rocky. At the distance of three miles and a half, in a north-west direction from its north end, are two dry sandbanks which are probably covered at high-water. Light-coloured water extended for three miles to the westward and for fourteen miles to the north-west; but the water is probably deep enough over it for any vessel to pass: we steered over the tail within the coloured water, but had no bottom with forty-five fathoms. In many parts near the island the rocks must be very little below the surface of the water, for the sea occasionally broke upon them.