A good animal adapts himself quickly. He is capable of learning by experience. In a country entirely new to him, he soon discovers the best method of getting about, where the feed grows, where he can find water. He is accustomed to foraging for himself. You do not need to show him his pasturage. If there is anything to eat anywhere in the district he will find it. Little tufts of bunch-grass growing concealed under the edges of the brush, he will search out. If he cannot get grass, he knows how to rustle for the browse (the tender vegetation such as shoots, leaves and twigs) of small bushes. Bullet would devour sage-brush, when he could get nothing else; and I have even known him philosophically to fill up on dry pine-needles. There is no nutrition in dry pine-needles, but Bullet got a satisfyingly full belly. On the trail, a well-seasoned horse will be always on the forage, snatching here a mouthful, yonder a single spear of grass, and all without breaking the regularity of his gait, or delaying the pack-train behind him. At the end of the day's travel, he is that much to the good. (Extract from a short story "The Mountain" by Stewart Edward White)The animal described in this extract was known as...​