In trailing horses, there will be no trouble while the ground is soft, as the impressions they leave will then be deep and distinct; but when they pass over hard or rocky ground, it is sometimes a very slow and troublesome process to follow them. Where there is grass, the trace can be seen for a considerable time, as the grass will be trodden down and bent in the direction the party has moved; should the grass have returned to its upright position, the trail can often be distinguished by standing upon it and looking ahead for some distance in the direction it has been pursuing; the grass that has been turned over will show a different shade of green from that around it, and this often marks a trail for a long time. Should all traces of the track be obliterated in certain localities, it is customary with the Indians to follow on in the direction it has been pursuing for a time, and it is quite probable that in some place where the ground is more favorable it will show itself again. Should the trail not be recovered in this way, they search for a place where the earth is soft, and make a careful examination, embracing the entire area where it is likely to run. Indians who find themselves pursued and wish to escape, scatter as much as possible, with an understanding that they are to meet again at some point in advance, so that, if the pursuing party follows any one of the tracks, it will invariably lead to the place of rendezvous. If, for example, the trail points in the direction of a mountain pass, or toward any other place which affords the only passage through a particular section of country, it would not be worth while to spend much time in hunting it, as it would probably be regained at the pass. [Illustration: HORSE-TRACKS AT ORDINARY SPEED.] As it is important in trailing Indians to know at what gaits they are traveling, and as the appearance of the tracks of horses are not familiar to all, I have in the following cut represented the prints made by the hoofs at the ordinary speed of the walk, trot, and gallop, so that persons, in following the trail of Indians, may form an idea as to the probability of overtaking them, and regulate their movements accordingly.