Page:Lake Ngami.djvu/170

162 before us, then at each other in mute dismay and astonishment. A dried-up vley, very little more than a mile in extent, and a patch of reeds, was the only reward for months of toil and anxiety!

as the basin of Omanbondè then was, it nevertheless appeared evident that, at no distant period, it had contained a good deal of water. Moreover, there could be but little doubt as to hippopotami having also, at one time, existed there.

On becoming better acquainted with the geography of these regions, we thought we were able to explain the phenomenon satisfactorily. Thus, for instance, from (or to?) the deep, trough-shaped basin of Omanbondè leads a peculiar water-course, in an easterly direction, called Omuramba- k'Omanbondè, consisting of a succession of immense gulleys, very similar to Omanbondè itself. These (after being in a short time joined by the Omuramba-k'Omatako) we supposed to be connected with some large permanent water,