At eight o'clock the next morning we were again underweigh; and, with the flood-tide in our favour, made rapid progress. The opening had, however, become so much contracted, that it was found prudent to have a boat hoisted out, with the kedge and a hawser ready if the vessel should get on shore. After proceeding two miles further, it took a more easterly course, and as we advanced the general direction of the reaches were east and south. Our speculations ran high with regard to what it might be, and the probability of its being a large river appeared to our sanguine minds so certain that we never once fancied it could be otherwise; when suddenly the open sea appeared, and, demonstrating it to be merely a strait, at once dispelled our hopes. Upon reaching between the two heads which form the south entrance of this Strait, the tide turned, and, beginning to run so swiftly back that we were prevented from getting out, obliged us very reluctantly to return to an anchorage within, which was not easily found, as the bottom was rocky and thickly studded with shoals. The anchor was at last dropped at three miles within the entrance near an open cliffy bank, on which there were two canoes hauled up, but no sign of their owners. The night was squally, and the tide ran at the rate of nearly four knots. May 20. At low water the next morning the shoals were exposed, and showed us the dangers we had unknowingly encountered in passing over them when they were covered. The passages between them were found to be so intricate that, after sounding them for some time, we gave up all idea of passing out by the south entrance. May 21. And, returning by the way we came, the next day anchored near our former position in St. Asaph Bay. The Strait was named Apsley; and the land on the western side which had thus been proved to be insulated was named in compliment to the Right Honourable Earl Bathurst, his Majesty's Principal Secretary of State for the Colonies. May 22. The day following we coasted the North-West side of Bathurst Island; and at sunset anchored off a point from which a reef projects for a considerable distance into the sea. May 23. The next day we anchored off an opening at the bottom of an extensive bay, in three and a half fathoms. It happened to be high water when we anchored; and, although we were three miles from the shore, the tide of ebb reduced the depth so much that there was reason to apprehend the cutter's being left dry at low water; the depth was, however, ten feet and a half, which was only eighteen inches more than the cutter's draught. May 23. The opening off which we had anchored was formed between two low, sandy points, and trended in to the South-East; on the land at the back was a long round-backed hill, which, when viewed from the northward, had a flat-topped appearance. May 24.