Other tours of discovery into Africa have been made to which it is not necessary here to refer. The practical result of all these expeditions, up to about the middle of the nineteenth century, was a rough outline of information in regard to the coast countries of Africa, the course of the Niger, the manners and customs of the tribes of Southern Africa, and a little more definite knowledge concerning Northern and Central Africa, embracing herein the great desert, Lake Tsad, the river Niger, and the people between the desert and the Gulf of Guinea. Perhaps the most comprehensive statement of the effect of this information upon Christian peoples was that it seemed to conclusively demonstrate an imperative demand for missionary labors. Even the Mohammedans of the Moorish Kingdom of Ludamar, set loose a wild boar upon Mungo Park. They were astonished that the wild beast assailed the Moslems instead of the Christian, and afterwards shut the two together in a hut, while King and council debated whether the white man should lose his right arm, his eyes, or his life. During the debate, the traveler escaped. If the Mohammedan Africans were found to be thus cruel, it may well be inferred that those of poorer faith were no less bloodthirsty. And thus, as one of the results of the expeditions to which we have referred, a renewed zeal in proselytism and discovery was developed. Thus, the two most distinguished African travellers, and who have published the most varied, extensive, and valuable information in regard to that continent, performed the labors of their first expeditions cotemporaneously, the one starting from the north of Africa, the other from the south. We can but refer to the distinguished Dr. Heinreich Barth, and him who is largely referred to in this volume, Dr. David Livingstone. The expeditions were not connected the one with the other, but had this in common that both were begun under the auspices of the British government and people. A full narrative of Dr. Barth’s travels and discoveries has been published, from which satisfactory information in regard to much of northern and central Africa may be obtained. The narrative is highly interesting and at once of great popular and scientific value. Hence the world has learned the geography of a wide expanse of country round about Lake Tsad in all directions; far toward Abyssinia northeasterly, as far west by north as Timbuctoo, several hundred miles southeasterly, and as far toward the southwest, along the River Benue, as the junction of the Faro. Dr. Barth remained in Africa six years, much of the time without a single white associate, his companions in the expedition having all died. Dr. Overweg, who was the first European to navigate Lake Tsad, died in September, 1852. Mr. Richardson, the official chief of the expedition, had died in March of the previous year.