The current was slower but still perceptible although we found the water had ebbed six inches during the night an indication that it was already influenced by the tide although it tasted perfectly fresh. At a place where I observed the sun's meridian altitude I found the breadth on measurement to be 71 yards and the depth on sounding, 4 1/2, 3 1/2 and 3 fathoms. The direction of the course had there however changed. To the camp of last night it had been remarkably straight towards south-south-east although full of turnings being what may be termed straight serpentine,* and I had accordingly expected to find the estuary at Portland Bay in which case it was likely to be sheltered sufficiently by Cape Nelson to form a harbour. Now however the general course was nearly west and it preserved the same general direction without much winding during the progress we made throughout the day. I had therefore every reason to suppose that it would thus terminate in the wide bay between Cape Northumberland and Cape Bridgewater. The scenery on the long reaches was in many places very fine from the picturesque character of the limestone-rock and the tints and outline of the trees, shrubs, and creepers upon the banks. In some places stalactitic grottoes covered with red and yellow creepers overhung or enclosed cascades; at other points casuarinae and banksia were festooned with creeping vines whose hues of warm green or brown were relieved by the grey cliffs of more remote reaches as they successively opened before us. (*Footnote. See Colonel Jackson's paper also referred to above.) BLACK SWANS. Black swans being numerous, we shot several; and found some eggs which we thought a luxury among the bulrushes at the water's edge. But we had left, as it seemed, all the good grassy land behind us; for the stringybark and a species of Xanthorrhoea (grass-tree) grew to the water's edge both where the soil looked black and rich and where it possessed that red colour which distinguishes the best soil in the vicinity of limestone rock. One or two small tributaries joined the river the principal one coming from the left bank at that point or angle where the great change takes place in its course. When the sun was near setting we put ashore on this bank and from a tree on the highest part of the country behind it we now once again saw Mount Gambier bearing 57 degrees West of North. WATER BRACKISH.