We had by this time reached a part of the country where woods and hills could be seen rising here and there above the plain.  The rearmost of the buffalo had become separated, and many of the Indians, having exhausted their arrows, were now attacking them with their spears; two hunters generally singling out one animal, and riding alongside it till they had wounded it to death.  As far as I could see, on either side, the country exhibited an animated scene,--the buffalo scampering along in every direction, with Indians riding after them, their robes wildly flying in the air, while they flourished their spears above their heads. On the ground over which we had come could be distinguished numerous dark spots,--the bodies of the buffalo we had slain.  Indeed, our comparatively small party had, I afterwards found, killed upwards of two hundred animals; which will give some idea of the numbers annually slaughtered by the Indians.