Population among the Boers increases rapidly; they marry soon, are seldom sterile, and continue to have children late. I once met a worthy matron whose husband thought it right to imitate the conduct of Abraham while Sarah was barren; she evidently agreed in the propriety of the measure, for she was pleased to hear the children by a mother of what has been thought an inferior race address her as their mother. Orphans are never allowed to remain long destitute; and instances are frequent in which a tender-hearted farmer has adopted a fatherless child, and when it came of age portioned it as his own. Two centuries of the South African climate have not had much effect upon the physical condition of the Boers. They are a shade darker, or rather ruddier, than Europeans, and are never cadaverous-looking, as descendants of Europeans are said to be elsewhere. There is a tendency to the development of steatopyga, so characteristic of Arabs and other African tribes; and it is probable that the interior Boers in another century will become in color what the learned imagine our progenitors, Adam and Eve, to have been. The parts of the colony through which we passed were of sterile aspect; and, as the present winter had been preceded by a severe drought, many farmers had lost two thirds of their stock. The landscape was uninviting; the hills, destitute of trees, were of a dark brown color, and the scanty vegetation on the plains made me feel that they deserved the name of Desert more than the Kalahari. When first taken possession of, these parts are said to have been covered with a coating of grass, but that has disappeared with the antelopes which fed upon it, and a crop of mesembryanthemums and crassulas occupies its place. It is curious to observe how, in nature, organizations the most dissimilar are mutually dependent on each other for their perpetuation. Here the original grasses were dependent for dissemination on the grass-feeding animals, which scattered the seeds. When, by the death of the antelopes, no fresh sowing was made, the African droughts proved too much for this form of vegetation. But even this contingency was foreseen by the Omniscient One; for, as we may now observe in the Kalahari Desert, another family of plants, the mesembryanthemums, stood ready to neutralize the aridity which must otherwise have followed. This family of plants possesses seed-vessels which remain firmly shut on their contents while the soil is hot and dry, and thus preserve the vegetative power intact during the highest heat of the torrid sun; but when rain falls, the seed-vessel opens and sheds its contents just when there is the greatest probability of their vegetating. In other plants heat and drought cause the seed-vessels to burst and shed their charge.