Speaking of the fruits, he says: “There are great numbers of wild grape-vines growing in this quarter; indeed, they abound everywhere along the banks of the Zambesi. They are very fine; and it occurred to me that a country which yields the wild vines so very abundantly might be a fit one for the cultivated species. We found that many elephants had been feeding on the fruit called mokoronga. This is a black-colored plum, having purple juice. We all ate it in large quantities, as we found it delicious.” While exploring the Zambesi, Dr. Livingstone visited the hot spring of Nyamboronda, situated in the bed of a small rivulet called Nyaondo, which shows that igneous action is not yet extinct. The spring emitted water hot enough to cook a fish that might accidentally get into it. Dr. Livingstone represents the inhabitants, throughout his long journey of more than one thousand miles, as well disposed toward strangers, and a majority of them favorable to civilization and the banishment of the slave-trade, that curse of Africa. The population of this immense country has been estimated at from fifty to one hundred and fifty millions; but as we have no certain data from which to compute anything like a correct estimate of its inhabitants, it is difficult to arrive at a proper conclusion. Yet from all we can learn, I should judge one hundred and fifty millions is nearest to it. Recent travellers in Africa have discovered ruins which go far to show that the early settlers built towns, and then abandoned them for more healthy locations. In September, 1871, the South African explorer, Carl Mauch, visited the ruins of an ancient and mysterious city in the highland between the Zambesi and Limpopo Rivers, long known by native report to the Portuguese, and situated in a land, which from its gold and ivory, has long been identified by some authorities, as the Ophir of Scripture. Zimbaoe lies in about lat. 20 degrees 14 seconds S.; long. 31 degrees 48 seconds E. One portion of the ruins rises upon a granite hill about four hundred feet in relative height; the other, separated by a slight valley, lies upon a somewhat raised terrace. From the curved and zigzag form still apparent in the ruined walls which cover the whole of the western declivity of the hill, these have doubtless formed a once impregnable fortress. The whole space is densely overgrown with nettles and bushes, and some great trees have intertwined their roots with the buildings.