Analogous to this is the ability to follow a dim trail. A trail in the mountains often means merely a way through, a route picked out by some prospector, and followed since at long intervals by chance travelers.

It may, moreover, mean the only way through. Missing it will bring you to ever-narrowing ledges, until at last you end at a precipice, and there is no room to turn your horses around for the return. Some of the great box cañons thousands of feet deep are practicable by but one passage,—and that steep and ingenious in its utilization of ledges, crevices, little ravines, and "hog's-backs"; and when the only indications to follow consist of the dim vestiges left by your last predecessor, perhaps years before, the affair becomes one of considerable skill and experience. You must be able to pick out scratches made by shod hoofs on the granite, depressions almost filled in by the subsequent fall of decayed vegetation, excoriations on fallen trees. You must have the sense to know AT ONCE when you have overrun these indications, and the patience to turn back immediately to your last certainty, there to pick up the next clue, even if it should take you the rest of the day. In short, it is absolutely necessary that you be at least a persistent tracker.

Parenthetically; having found the trail, be charitable. Blaze it, if there are trees; otherwise "monument" it by piling rocks on top of one another. Thus will those who come after bless your unknown shade.

Third, you must know horses. I do not mean that you should be a horse-show man, with a knowledge of points and pedigrees. But you must learn exactly what they can and cannot do in the matters of carrying weights, making distance, enduring without deterioration hard climbs in high altitudes; what they can or cannot get over in the way of bad places. This last is not always a matter of appearance merely. Some bits of trail, seeming impassable to anything but a goat, a Western horse will negotiate easily; while others, not particularly terrifying in appearance, offer complications of abrupt turn or a single bit of unstable, leg-breaking footing which renders them exceedingly dangerous. You must, moreover, be able to manage your animals to the best advantage in such bad places. Of course you must in the beginning have been wise as to the selection of the horses.

Fourth, you must know good horse-feed when you see it. Your animals are depending entirely on the country; for of course you are carrying no dry feed for them. Their pasturage will present itself under a variety of aspects, all of which you must recognize with certainty. Some of the greenest, lushest, most satisfying-looking meadows grow nothing but water-grasses of large bulk but small nutrition; while apparently barren tracts often conceal small but strong growths of great value. You must differentiate these.

Fifth, you must possess the ability to pare a hoof, fit a shoe cold, nail it in place. A bare hoof does not last long on the granite, and you are far from the nearest blacksmith. Directly in line with this, you must have the trick of picking up and holding a hoof without being kicked, and you must be able to throw and tie without injuring him any horse that declines to be shod in any other way.

Last, you must of course be able to pack a horse well, and must know four or five of the most essential pack-"hitches."

With this personal equipment you ought to be able to get through the country. It comprises the absolutely essential.

But further, for the sake of the highest efficiency, you should add, as finish to your mountaineer's education, certain other items. A knowledge of the habits of deer and the ability to catch trout with fair certainty are almost a necessity when far from the base of supplies. Occasionally the trail goes to pieces entirely: there you must know something of the handling of an axe and pick. Learn how to swim a horse. You will have to take lessons in camp-fire cookery. Otherwise employ a guide. Of course your lungs, heart, and legs must be in good condition.

As to outfit, certain especial conditions will differentiate your needs from those of forest and canoe travel.