laden with moisture, which was deposited in abundance on the lowest terrace, in decreasing quantities on each succeeding plateau, and least of all on the vast plain in the interior. The farther to the north-east one proceeds the more is this perceptible, until the rich vegetation of the shore forms a striking contrast to the desert belt in the same latitudes on the Atlantic side.
As band after band was thrown off along the southern and south-eastern coast, and Bush girls were continually incorporated, the most advanced party at length probably contained more Bushman than pure Hottentot blood. It was so gradually absorbed, however, that it was assimilated, for these little tribes preserved the Hottentot customs and mode of living, and carried on hostilities with the Bushmen just as if they were wholly unconnected with those savages. Along this coast the Hottentots were never so numerous as along the shore of the Atlantic south of the Orange river. There were wide gaps between the various tribes or distinct bands, which were occupied solely by the aboriginal hunters. At the beginning of the sixteenth century of our era the Hottentots extended thus in a thin line, or rather a series of dots at varying distances from each other, from Walfish Bay on the western coast round to the mouth of the Umtamvuna river on the south-eastern, beyond which there is no indication that they ever advanced.
The cause of their being so thinly scattered along this line was their depending almost entirely upon milk for subsistence. They needed a large number of cows and ewes, and consequently a great extent of pasture for each separate community, as the cattle belonging to all the families composing it were herded together for reasons of safety, and were driven from place to place according to the state of the grass. As soon as a community became so large that this was impossible or even inconvenient, a swarm was of necessity thrown off, and moved to a distance in order to acquire a new pasture of sufficient extent for its use. The offshoot might for a time consider itself a dependency of the parent band, or a clan of the tribe, but the tendency would soon be towards perfect independence. There was no other way of extension, for a party moving needed to be strong enough to
