In many parts the lava-streams may be recognized, for there the rock is rent and split in every direction, but no soil is yet found in the interstices.

When we were sitting in the evening, after a hot day, it was quite common to hear these masses of basalt split and fall among each other with the peculiar ringing sound which makes people believe that this rock contains much iron.

Several large masses, in splitting thus by the cold acting suddenly on parts expanded by the heat of the day, have slipped down the sides of the hills, and, impinging against each other, have formed cavities in which the Bakaa took refuge against their enemies.

The numerous chinks and crannies left by these huge fragments made it quite impossible for their enemies to smoke them out, as was done by the Boers to the people of Mankopane.
This mass of basalt, about six miles long, has tilted up the rocks on both the east and west; these upheaved rocks are the ancient silurian schists which formed the bottom of the great primaeval valley, and, like all the recent volcanic rocks of this country, have a hot fountain in their vicinity, namely, that of Serinane.
In passing through these hills on our way north we enter a pass named Manakalongwe, or Unicorn's Pass.

The unicorn here is a large edible caterpillar, with an erect, horn-like tail.