At The Rocky Foot Of A Low, Humpy Hill On The Northern Side, About Fifteen Feet Above The Present Surface

Of the water I detected in most distinct and definite lines the agency of waves. From its base could be

Traced clear to the edge of the dank morass tiny lines of comminuted shell as plainly marked as the small particles which lie in rows on a beech after a receding tide. There is no doubt that the wave-marks on the sandstone might have been traced much higher by one skilled in geology; it was only its elementary character that was visible to me. Nor do I entertain the least doubt, after a two days' exploration of the neighbourhood, especially of the low plain at the western end, that this Lake of Ugombo is but the tail of what was once a large body of water equal in extent to the Tanganika; and, after ascending half way up Ugombo Peak, this opinion was confirmed when I saw the long-depressed line of plain at its base stretching towards the Mpwapwa Mountains thirty miles off, and thence round to Marenga Mkali, and covering all that extensive surface of forty miles in breadth, and an unknown length. A depth of twelve feet more, I thought, as I gazed upon it, would give the lake a length of thirty miles, and a breadth of ten. A depth of thirty feet would increase its length over a hundred miles, and give it a breadth of fifty, for such was the level nature of the plain that stretched west of Ugombo, and north of Marenga Mkali.

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