We had, as I have said, intended starting at the earliest dawn, but the night was so clear and refreshing, and the moon so bright that we determined to avail ourselves of both, and accordingly left the tents at 3 a.m. I directed Harris to strike them at 8, and to have every thing in readiness for our departure at that hour. We then commenced our excursion, and I led my companions rapidly along the shore of Encounter Bay, after crossing the sand-hills about a mile below the camp. After a hasty and distressing walk of about seven miles, we found that the sand-hills terminated, and a low beach spread before us. The day was just breaking, and at the distance of a mile from us we saw the sand-hill I have already had occasion to notice, and at about a quarter of a mile from its base, we were checked by the channel; which, as I rightly conjectured, being stopped in its easterly course by some rising ground, the tongue of land on which the blacks were posted, suddenly turns south, and, striking this sand-hill, immediately enters the sea; and we noticed, in the bight under the rising ground, that the natives had lit a chain of small fires. This was, most probably, a detached party watching our movements, as they could, from where they were posted, see our camp. At the time we arrived at the end of the channel, the tide had turned, and was again setting in. The entrance appeared to me to be somewhat less than a quarter of a mile in breadth. Under the sand-hill on the off side, the water is deep and the current strong. No doubt, at high tide, a part of the low beach we had traversed is covered. The mouth of the channel is defended by a double line of breakers, amidst which, it would be dangerous to venture, except in calm and summer weather; and the line of foam is unbroken from one end of Encounter Bay to the other. Thus were our fears of the impracticability and inutility of the channel of communication between the lake and the ocean confirmed. DIFFICULTIES AND DANGERS OF THE RETURN. I would fain have lingered on my way, to examine, as far as circumstances would permit, the beautiful country between the lake and the ranges; and it was with heart-felt sorrow that I yielded to necessity. My men were indeed very weak from poverty of diet and from great bodily fatigue. Hopkinson, Mulholland, and Macnamee were miserably reduced. The two former, especially, had exerted themselves beyond their strength, and although I am confident they would have obeyed my orders to the last, I did not feel myself justified, considering the gigantic task we had before us, to impose additional labour upon them. It will be borne in mind that our difficulties were just about to commence, when those of most other travellers have ceased; and that instead of being assisted by the stream whose course we had followed, we had now to contend against the united waters of the eastern ranges, with diminished strength, and, in some measure, with disappointed feelings.