Many of the Spanish soldiers were killed in the wars with the Mexicans, and their horses broke loose and ran away. Some of them may have been caught again by the Mexicans, but many others escaped and were never captured again, and ran wild through the country. The descendants of these horses grew and multiplied and spread over parts of North and South America, going south into the great plains or pampas, and north into the prairie lands of Texas and the valleys of California. These horses still run wild, and are the only really wild horses in the world. At the same time, they may not precisely resemble the first real wild horses, for their fathers were tame, and, perhaps, they still remember something of this, and have strange legends among themselves of the old days when their ancestors were good Spanish cavalry horses. The early settlers that landed in other parts of the country, at New Amsterdam, at Jamestown and Plymouth Bay, also brought tame horses with them, and these, in turn, spread over North America, as the settlers moved out toward the west. These horses are now called "American horses," to distinguish them from the wild horses of Texas and California. The American horses, in time, met the wild horses, and then men noticed that they were very different animals. The wild horse is smaller and more muscular, he has stronger and stouter limbs, a larger head, and a more bushy mane and tail. His ears are longer and more inclined to lie back on his head, his feet are smaller and more pointed in front, and his hair is rougher and thicker. His color is often curiously mixed in black and white dots and flecks, like some circus horses that you may have seen; and, if his color is uniform, it is generally dark red or deep gray or mouse color. These mustangs are quite wild, and have no fixed feeding-ground. They scamper in droves over the rolling prairies and pampas, and sleep at night in such dry places as they can find. They keep in companies for protection against bears or other wild animals, and if they are attacked, they put their noses together and form a circle with their heels out, as if they had been told of the old Spanish fighting days, and of the soldiers forming with their pikes solid squares to resist attacks of cavalry. They can defend themselves against the bears in this way, but against the lightning and men they have no protection, except to run away as fast as they can. A thunder storm, or a very high wind, fills them with terror, and away they go at furious speed through the grass, and, at last, disappear in a cloud of dust on the horizon.