Africa at this moment has an impossible access, a perilous climate, a penniless people, an undeveloped soil. So once had England. It may never be done; other laws may operate, unforeseen factors may interfere; but there is nothing in the soil, the products, the climate, or the people of Africa, to forbid its joining even at this late day in the great march of civilization. IV. THE HEART-DISEASE OF AFRICA. ITS PATHOLOGY AND CURE. The life of the native African is not all idyll. It is darkened by a tragedy whose terrors are unknown to any other people under heaven. Of its mild domestic slavery I do not speak, nor of its revolting witchcraft, nor of its endless quarrels and frequent tribal wars. These minor evils are lost in the shadow of a great and national wrong. Among these simple and unprotected tribes, Arabs--uninvited strangers of another race and nature--pour in from the North and East, with the deliberate purpose of making this paradise a hell. It seems the awful destiny of this homeless people to spend their lives in breaking up the homes of others. Wherever they go in Africa the followers of Islam are the destroyers of peace, the breakers up of the patriarchal life, the dissolvers of the family tie. Already they hold the whole Continent under one reign of terror. They have effected this in virtue of one thing--they possess firearms; and they do it for one object--ivory and slaves, for these two are one. The slaves are needed to buy ivory with; then more slaves have to be stolen to carry it. So living man himself has become the commercial currency of Africa. He is locomotive, he is easily acquired, he is immediately negotiable. Arab encampments for carrying on a wholesale trade in this terrible commodity are now established all over the heart of Africa. They are usually connected with wealthy Arab traders at Zanzibar and other places on the coast, and communication is kept up by caravans which pass, at long intervals, from one to the other. Being always large and well supplied with the material of war, these caravans have at their mercy the feeble and divided native tribes through which they pass, and their trail across the Continent is darkened with every aggravation of tyranny and crime. They come upon the scene suddenly; they stay only long enough to secure their end, and disappear only to return when a new crop has arisen which is worth the reaping.