From subsequent information, I called this Doubtful Bay; the tide ran into it at the rate of from 1 to 3 knots, but the clear appearance of the water, and entire absence of driftwood, afforded strong grounds for supposing that it did not receive the waters of any river. Leaving Raft Point, we crossed over to the islands on the opposite side, for a few angles on their southern extreme, and afterwards made the best of our way to Freshwater Cove. The day had, however, closed in long before arriving there, and in the extreme darkness of the night the Cove was difficult to find. Indeed my companions could not believe we were there until one of the men returned with a keg of water from the stream in the head of it. MR. HELPMAN'S REPORT. Mr. Helpman joined us at sunset, and gave the following report of his proceedings: "On leaving the cove at Raft Point, we passed along the south shore for two miles, and landed on a point that afforded a most commanding view of the bay, and the openings in its North-East corner, which appeared to be formed by a large island lying near the shore. This supposition afterwards proved to be correct, on landing at a point fronting its western extreme, from whence I was enabled to trace the shore round the North-East corner of the bay, till I identified it as the same we had seen on the eastern side of the island from the station just left. From the still and discoloured state of the water, I felt satisfied there was no opening in the North-East corner of this bay. I am, however, willing to admit it may have been more satisfactory to others if there had been sufficient time at my disposal to have actually gone round the island. We now hastened off to examine the mainland, lying behind a chain of islands to the northward, where we also failed to discover an opening." MOUTH OF THE GLENELG. As this account of Mr. Helpman's coincided with the opinion I had formed of the other parts of the coast, I was induced at that time to come to the conclusion that the river Glenelg which I found Lieutenants Grey and Lushington had discovered, on my return to the ship, did not communicate with the sea in this neighbourhood, as Lieutenant Grey had supposed, but took a South-West direction, flanking Collier Bay, and terminating in the mangrove openings on the eastern shore of Stokes' Bay in King's Sound. My opinion was strengthened by Lieutenant Lushington having seen from his furthest position (which has already been given) a very high bluff point to the southward, distant 6 or 7 miles, and a line of cliffs under which he conceived that an opening of the sea or a river may run. Further experience has convinced me of the great difficulty attending the discovery of the mouths of rivers in Australia, and as Mr. Helpman did not actually visit the North-East corner of Doubtful Bay (named in consequence) I am inclined to believe there is a possibility of the mouth of the Glenelg still being found there. April 14.