We had proceeded about twenty miles, when we reached a level stretch of prairie, and directly in front of us, at a distance of perhaps two miles was the herd quietly grazing, all unsuspecting of the danger that menaced them. It was not a very large drove, and they kept quite close together. It was the season when the buffaloes wandered off from the main herd in small bands, and the prairies were dotted for miles with these black clumps, like great dark splashes on a carpet of emerald. The plan of attack was decided upon in council, and the band disposed of in a manner that would insure the complete and speedy extermination of our game. We were about to make a "surround." The warriors were divided into two columns, and taking opposite directions, drew themselves gradually around the herd at a distance of about a mile from them. We continued to deploy in this manner until a complete circle was formed, and then, at a given signal, we closed in upon the buffaloes, keeping our impatient steeds at a moderate pace. The herd soon got the wind of the advancing enemy, and fled in a body in the greatest confusion. To the point where the buffaloes were aiming to cross our line, the horsemen were gathering, and forming in column, brandishing their weapons and yelling in the most frightful manner, by which means they turned the surging mass. Seeing themselves baffled at this point, they would rush off in an opposite direction, when they would again be met by a formidable column and again repulsed in utter confusion. By this time we had closed in from all directions, forming a continuous line that circled the throng like the deadly coils of the cobra. The buffaloes had become completely demoralized, and were eddying about in a crowded and confused mass, hooking and climbing upon each other. Now was the time for the onslaught. Tonsaroyoo, by whose side I was riding, placed the whistle to his lips and gave the signal. Then followed a scene of wild confusion. The horsemen dashed upon the bewildered buffaloes with the rapidity of thought almost, using their lances and arrows with murderous effect. In the turmoil a cloud of dust was raised which in part obscured those of the band who did not immediately surround me. The excitement was intense, and soon all became one immense blur, in which hunters and buffaloes were indiscriminately mixed. I could see the Indians galloping their horses around the animals and driving the whizzing arrows or long lances to the hearts of their quarry. My own pony had penetrated deep into the herd, and with a sagacity that a long experience alone could develop, was laying his course straight for an enormous bull that was flanking the herd. Had _my_ taste been consulted, I should certainly have declined to try conclusions with such an ugly customer, but there was no avoiding the encounter, and, selecting an arrow, I drew my bow and waited a favorable opportunity to send it through the bison.