On the evening of the last day of June we had pitched our camp on the bank of a considerable stream, the largest we had yet seen. Its breadth is from thirty to forty yards, and its depth from one to three yards. The water is clear and cool, but its current is strikingly sluggish. It flows from north-west to south-east, through a trough-like plateau about eighteen miles long, which bends, crescent-shaped, round the foot-hills of the Kenia. The greatest breadth of this plateau in the middle is nearly nine miles, whilst it narrows at the west end to less than a mile, and at the east end to two miles and a half. This trough-like area of about 100 square miles consists entirely of rich grass-land, with numerous small groves of palms, bananas, and sycamores. It is bounded on the south by the grassy hills which we had crossed over, on the west by abrupt rocky walls, on the north partly by dark forest-hills, and partly by barren lofty rocks which hide from view the main part of the Kenia lying behind them. On the east, between the hills to the south and the rocks to the north, there is an opening through which the stream finds its outlet by a waterfall of above 300 feet, and the thunder and plashing of which were audible at the great distance at which we were. This river, which was later found to be the upper course of the Dana, entering the Indian Ocean on the Witu coast, enters our plateau by a narrow gate of rocks through which we were not at first able to pass. From the north, down the declivities of the foot-hills of the Kenia, four larger and many smaller streams hurry to the Dana, and in their course through their rocky basins form a number of more or less picturesque cascades. The height of this large park-like plateau above the sea-level, measured at its lowest point--the stream-bed--is nearly 6,000 feet.