This and blood-brotherhood closed the formal proceedings of the treaty-making powers--quite as important, in their way, as similar councils in civilized countries. Stanley found by observation that though he had traveled from Nyangwe over one thousand two hundred miles, he had descended not quite a thousand feet. CHAPTER XXIV. AMONG THE CATARACTS. It is a little singular, that in this age of inquiry and persistent effort to get at the cause of things, no one has yet attempted to explain the reason of tribal differences. Aborigines occupying the same parallels of latitude and longitude, subject to the same influences of climate, living on the same diet, are different in color, features, and more than all, in disposition. The real, or supposed influences, that lie at the bottom of the different races, do not apply here. Difference of origin, of climate, of food, all these must have great effect in changing color, features and character, and hence, to a certain extent, explain how such distinct nationalities exist, but they do not in the least account for tribal differences where all these are the same, and where there are not even barriers of mountains and rivers separating them. Why should our western Indian tribes, roaming over the same prairies, living on the same food, and similar in all their modes of life, be yet so different in form, feature and disposition? Is there really no way of getting a satisfactory, true explanation of all this? So in Africa, Stanley crossed the continent in the same general range of latitude. The savages he met were all dwellers of the equatorial region, and hence lived in the same climate, used the same food, dressed in the same way, and lived the same life, and yet they were as dissimilar as different nationalities. If any educational influences had been brought to bear upon them one could understand this, but none have been exerted. These same tribal differences Stanley found on the Congo. Fierce cannibals and gentle agricultural people were living side by side. Suspicious, faithless men, differing very little from the better class of monkeys, lived neighbors to tribes unsuspicious and trustful, and wonderfully advanced in the arts of mechanism. At the falls, which were named "Stanley Falls," the natives were suspicious, faithless, cruel, but when he reached the Livingstone Falls, he found the people hospitable, kind and trustful. When this difference burst on Stanley practically, he felt it sensibly, but he philosophically dismissed it with the simple remark, such "is the effect of trade." We cannot accept this explanation at all, for they had no trade with the outside world, and they showed the same kindly natures before _he_ commenced trading with them. The only evidence of their connection with civilized life was that they had muskets, and yet the very first tribe which possessed them was the most fierce, implacable and relentless he met with. This ethnological question has never yet been settled.