“_First_--He has heard of the existence of four fountains, two of which give birth to a river flowing north--Webb’s River, or the Lualaba; two to a river flowing south, which is the Zambezi. He has heard of these fountains repeatedly from the natives. Several times he has been within one hundred and two hundred miles from them, but something always interposed to prevent him going to see them. According to those who have seen them, they rise on either side of a mound or hill which contains no stones. Some have even called it an ant hill. One of these fountains is said to be so large that a man standing on one side cannot be seen from the other. These fountains must be discovered, and their position taken. The Doctor does not suppose them to lie south of the feeders of Lake Bangweolo. “_Second_--Webb’s River must be traced to its connection with some portion of the old Nile. “_Third_--The connection between the Tanganyika and the Albert Nyanza must be ascertained. “When these three things have been accomplished, then, and not till then, can the mystery of the Nile be explained. The two countries through which this marvellous lacustrine river--the Lualaba--flows, with its manifold lakes and broad expanses of water, are Rua--the Uruwa of Speke--and Manyema. For the first time Europe is made aware that between the Tanganyika and the known sources of the Congo there exist teeming millions of the negro race who never saw or heard of the white peoples who make such noisy and busy stir outside of Africa. Upon the minds of those who had the good fortune to see the first specimen of these remarkable white races Livingstone seems to have made a favorable impression, though, through misunderstanding his object and coupling him with the Arabs who make horrible work there, his life has been sought after more than once.