The next morning after the second day, started to the northwards; we passed a large vlei on the left, six miles from the Koranna station, which is the commencement of the sand-dunes. The dunes are small until sixteen miles of country are passed, then they assume great proportions. A mile to the left is another vlei, where we filled our water-casks and gave the oxen water, and remained the night, to have a clear day to pass over them. There were three Griquas' waggons outspanned, each waggon was full of women and children, each Jack had his Jill, and each a baby, plenty of little naked children of both sexes. They told me they were on the trek to the Orange river. These people are always quiet and civil, they exchanged a fat sheep for some tobacco. All the country, including the sand-dunes, is limestone with sand above, and full of low bush, many large and small land-shells are mixed up in the sand. _July 17th_.--The Griquas left early in the morning, and we started to cross the sand-dunes. A fearful road, their sides are about at an angle of thirty, and every time we ascend one, we have to put two spans of twenty-eight oxen in, to pull one waggon up at a time, which causes much delay shifting them backwards and forwards, as each dune rises from 150 to 200 feet in height, with deep sand in the road, the wheels sinking nine inches into it. After struggling over these for five hours, the oxen were done up, and we outspanned for the day at another large dry vlei, but on the bank a small spring of water was issuing, sufficient for the oxen and ourselves, a grand discovery, as we did not expect to find any until we had got clear of this heavy road. A short distance from the water were several families of Bushmen, sitting round a large fire; some of them had most extraordinary figures, thin calfless legs, prominent chests and abdomen, altogether different from the other Bushmen of the desert, and the colour of their skin was much lighter. A thin band of leather round their loins, and a skin over their shoulders was their only covering; long bundles of skins rolled up with several spears were lying on the ground. The food they live on in a great measure gives them this peculiar formation. They had the short bow and arrow, and quivers made of skins, full of arrows, cleverly made with bone heads, all smeared with poison. They appear to be half-Bushman, half-Koranna.