Wheresoever exploration has revealed a slave-hunter’s route, wherever the pioneer has indicated the objective of the raider, wherever it has been supposed danger might arise from northern or eastern Arab, the state has done its best to put a barrier in the shape of a military station; but there is an extent of country 500 miles in length between the sources of the Aruwimi and the Lukuga affluent, and an area of 200,000 square miles, wholly at the mercy of the Arabs of the east coast, and southwestern Tanganika and Rua are not yet under surveillance. Meantime every event that is occurring in that part of Africa tends to the early extirpation of slave hunting and trading. Five years ago no one could have anticipated that any measure devised by human wisdom could have checked the destroying advance of the slavers. Yet a more remarkable success has never been achieved before. It has been effected solely by a continuously increasing and silent pressure from civilization. There have been no bloody conflicts and no violence. Tact mainly has guided the advance, and a constant pushing up of men and supplies has obviated the necessity of retreat. Advantageous sites near the camp of the slavers have been quietly occupied. Modest little huts have been put up for temporary shelter; but with every voyage of the river steamers new men and more supplies have been brought up; the surroundings are more cleared; the officers continue their amiable intercourse; there is no overstrenuous insistence, no imperious mandate--until in a few months the camp imperceptibly has become a fort and the little following has become a numerous garrison, and resistance to the pressure is out of the question.