So long as the buffalo remained in large herds their numbers gave each individual a feeling of dependence upon his fellows and of general security from harm, even in the presence of strange phenomena which he could not understand. When he heard a loud report and saw a little cloud of white smoke rising from a gully, a clump of sage-brash, or the top of a ridge, 200 yards away, he wondered what it meant, and held himself in readiness to follow his leader in case she should run away. But when the leader of the herd, usually the oldest cow, fell bleeding upon the ground, and no other buffalo promptly assumed the leadership of the herd, instead of acting independently and fleeing from the alarm, he merely did as he saw the others do, and waited his turn to be shot. Latterly, however, when the herds were totally broken up, when the few survivors were scattered in every direction, and it became a case of every buffalo for himself, they became wild and wary, ever ready to start off at the slightest alarm, and run indefinitely. Had they shown the same wariness seventeen years ago that the survivors have manifested during the last three or four years, there would now be a hundred thousand head alive instead of only about three hundred in a wild and unprotected state. Notwithstanding the merciless war that had been waged against the buffalo for over a century by both whites and Indians, and the steady decrease of its numbers, as well as its range, there were several million head on foot, not only up to the completion of the Union Pacific Railway, but as late as the year 1870. Up to that time the killing done by white men had been chiefly for the sake of meat, the demand for robes was moderate, and the Indians took annually less than one hundred thousand for trading. Although half a million buffaloes were killed by Indians, half-breeds, and whites, the natural increase was so very considerable as to make it seem that the evil day of extermination was yet far distant. But by a coincidence which was fatal to the buffalo, with the building of three lines of railway through the most populous buffalo country there came a demand for robes and hides, backed up by an unlimited supply of new and marvellously accurate breech-loading rifles and fixed ammunition. And then followed a wild rush of hunters to the buffalo country, eager to destroy as many head as possible in the shortest time. For those greedy ones the chase on horseback was "too slow" and too unfruitful. That was a retail method of killing, whereas they wanted to kill by wholesale. From their point of view, the still-hunt or "sneak" hunt was the method _par excellence_. If they could have obtained Gatling guns with which to mow down a whole herd at a time, beyond a doubt they would have gladly used them.