We were much surprised, considering that this region is almost uninhabited, to discover near the lake shore a native path so beaten, and so recently beaten, by multitudes of human feet, that it could only represent some trunk route through the continent. Following it for a few miles, we soon discovered its function. It was one of the great slave routes through Africa. Signs of the horrid traffic became visible on every side; and from symmetrical arrangements of small piles of stones and freshly cut twigs, planted semaphore-wise upon the path, our native guides made out that a slave caravan was actually passing at the time. We were in fact between two portions of it, the stones and twigs being telegraphic signals between front and rear. Our natives seemed much alarmed at this discovery, and refused to proceed unless we promised not to interfere--a proceeding which, had we attempted it, would simply have meant murder for ourselves and slavery for them. Next day from a hill-top we saw the slave encampment far below, and the ghastly procession marshaling for its march to the distant coast, which many of the hundreds who composed it would never reach alive. Talking of native foot-paths leads me to turn aside for a moment, to explain to the uninitiated the true mode of African travel. In spite of all the books that have been lavished upon us by our great explorers, few people seem to have any accurate understanding of this most simple process. Some have the impression that everything is done in bullock wagons; an idea borrowed from the Cape, but hopelessly inapplicable to Central Africa, where a wheel at present would be as great a novelty as a polar bear. Others, at the opposite extreme, suppose that the explorer works along solely by compass, making a bee-line for his destination, and steering his caravan through the trackless wilderness like a ship at sea. Now, it may be a surprise to the unenlightened to learn that probably no explorer in forcing his passage through Africa has ever, for more than a few days at a time, been off some beaten track. Probably no country in the world, civilized or uncivilized, is better supplied with paths than this unmapped continent. Every village is connected with some other village, every tribe with the next tribe, every State with its neighbor, and therefore with all the rest. The explorer's business is simply to select from this network of tracks, keep a general direction, and hold on his way. Let him begin at Zanzibar, plant his foot on a native foot-path, and set his face towards Tanganyika. In eight months he will be there. He has simply to persevere. From village to village he will be handed on, zig-zagging it may be, sometimes, to avoid the impassable barriers of nature or the rarer perils of hostile tribes; but never taking to the woods, never guided solely by the stars, never in fact leaving a beaten track, till hundreds and hundreds of miles are between him and the sea, and his