The engravings with which the work is profusely illustrated have been derived from many sources. For the most part the countenances of the people have been drawn from photographs, and in many instances whole groups taken by the photographer have been transferred to the wood-block, the artist only making a few changes of attitude, so as to avoid the unpleasant stiffness which characterizes photographic groups. Many of the illustrations are taken from sketches made by travellers, who have kindly allowed me to make use of them; and I must here express my thanks to Mr. T. Baines, the accomplished artist and traveller, who made many sketches expressly for the work, and placed at my disposal the whole of his diaries and portfolios. I must also express my thanks to Mr. J. B. Zwecker, who undertook the onerous task of interpreting pictorially the various scenes of savage life which are described in the work, and who brought to that task a hearty good-will and a wide knowledge of the subject, without which the work would have lost much of its spirit. The drawings of the weapons, implements, and utensils, are all taken from actual specimens, most of which are in my own collection, made, through a series of several years, for the express purpose of illustrating this work. That all uncivilized tribes should be mentioned, is necessarily impossible, and I have been reluctantly forced to dismiss with a brief notice, many interesting people, to whom I would gladly have given a greater amount of space. Especially has this been the case with Africa, in consequence of the extraordinary variety of the native customs which prevail in that wonderful land. We have, for example, on one side of a river, a people well clothed, well fed, well governed, and retaining but few of the old savage customs. On the other side, we find people without clothes, government, manners, or morality, and sunk as deeply as man can be in all the squalid miseries of savage life. Besides, the chief characteristic of uncivilized Africa is the continual change to which it is subject. Some tribes are warlike and restless, always working their way seaward from the interior, carrying their own customs with them, forming settlements on their way, and invariably adding to their own habits and superstitions those of the tribes among whom they have settled. In process of time they become careless of the military arts by which they gained possession of the country, and are in their turn ousted by others, who bring fresh habits and modes of life with them. It will be seen, therefore, how full of incident is life in Africa, the great stronghold of barbarism, and how necessary it is to devote to that one continent a considerable portion of the work. AMERICAN PUBLISHERS’ PREFACE.