Zanzibar, the objective point of the journey, is on an island of the same name, twenty miles from the east coast of Africa, and in latitude 6° South. It is a Mohammedan town of 30,000 people, with many good houses and mosques. Though the soil is excellent and prolific of fruits and vegetables, the town depends for its prosperity on trade and commerce. When the slave trade was driven from the Atlantic coast of Africa, it found its way to the eastern, or Pacific coast, and flourished in a manner never before known. Zanzibar, always notorious as a slave depot, became the recognized headquarters of the horrid traffic, and rapidly rose to a position of great wealth and influence. Her slave market attracted the notice and excited the disgust and indignation of strangers of every creed and country. Nothing could be more revolting than sight of the Arabic purchasers of slaves examining the build, the eyes, the teeth, and all the physical qualities of the victims offered for sale in the marts. Tens of thousands of slaves were known to pass through Zanzibar annually on their way to various parts of Egypt and Turkey. On the appearance of British cruisers on the coast, with orders to capture and condemn all slave dhows, the Sultan of Turkey prohibited the traffic at Zanzibar. But this only diverted its course. The next step was to induce the Sultan to issue a general proclamation, prohibiting the trade in all places on the coast, under his authority. This was done in 1876. The result has been a considerable diminution of the infamous traffic, which can now only be carried on by a system of smuggling, which incurs much risk. Zanzibar is the most important starting point for travelers and missionaries destined for Central Africa, and is a depot for such supplies as may be needed from time to time. [Illustration: SLAVE MARKET.] From every point of view his route was well chosen. Skirting the Unyoro country, he fell under their displeasure and became the victim of a fierce attack, which he parried successfully. This opened his way for a considerable distance along the ranges of mountains which pass under the general name of the Baleggas These mountains rise to the immense height of 18,000 to 19,000 feet, and their summits are capped with snow. The huts of the natives were visible on their sides at altitudes of 8,000 feet. During their nineteen marches along the base of these ranges, their severest obstacle was the Semliki river, a bold stream, 100 yards wide, whose crossing was rendered doubly difficult by the Warasmas natives. They formed an ambuscade, from which they delivered a single volley at the travelers, but fortunately it proved ineffective. It did not take much of a demonstration to put them to flight.