The first and simplest use made of the animals from which man derives strength appears to have been brought about by the subjugation of wild cattle--the bulls and buffaloes. Several wild varieties of the bovine tribe were originally widely disseminated in Europe and Asia, and these forms must have been frequent objects of chase by the ancient hunters. Although in their adult state these animals were doubtless originally intractable, the young were mild-mannered, and, as we can readily conceive, must often have been led captive to the abodes of the primitive people. As is common with all gregarious animals which have long acknowledged the authority of their natural herdsmen, the dominant males of their tribe, these creatures lent themselves to domestication. Even the first generation of the captives reared by hand probably showed a disposition to remain with their masters; and in a few generations this native impulse might well have been so far developed that the domestic herd was established, affording perhaps at first only flesh and hides, and leading the people who made them captives to a nomadic life--that constant search for fresh fields and pastures new which characterizes people who are supported by their flocks and herds. It is a curious fact that the kindred of the buffaloes and bisons differ exceedingly in the measure of their domesticability. Thus, the ordinary buffalo of Asia, though a dull brute, is very subjugable, even in the literal sense, for he makes a tolerable beast for the plough and bears the yoke with due patience. His African kinsman, on the other hand, is perhaps the most unconquerable of all the large wild animals. The late Sir Samuel Baker, in answer to my question as to what wild form was the most to be feared in combat, unhesitatingly answered, "The African buffalo, the bulls of which charge home upon any aggressor with an immediate and determined fury, which often enables them to kill the hunter after they have been shot through the brain." Our American bison, though a much milder-spirited beast, seems also to be essentially undomesticable for the reason that he cannot be taught to subordinate his desires to the will of man. He can readily be brought to the point where he will tolerate captivity; but if, when engaged in ploughing, it occurs to him that he needs water, he will straightway go in search of it, not in a vicious, but in a perfectly obdurate manner. This quality of mind appears to be accountable for the failure of the many experiments which have been made to domesticate this interesting American form.