“Billy is as awkward-looking as he moves about as Bighorn is graceful, but he will go where even Bighorn will hesitate to follow. His hoofs are small and especially planned for walking in safety on smooth rock and ice-covered ledges. In weight he is about equal to Lightfoot the Deer, but he doesn't look in the least like him. “In the first place he has a hump on his shoulders much like the humps of Thunderfoot the Bison and Longcoat the Musk Ox. Of course this means that he carries his head low. His face is very long and from beneath his chin hangs a white beard. From his forehead two rather short, slim, black horns stand up with a little curve backward. His coat is white and the hair is long and straight. Under this long white coat he wears a thick coat of short, woolly, yellowish-white fur which keeps him warm in the coldest weather. He seldom leaves his beloved mountain-tops, even in the worst weather of winter, as Bighorn sometimes does, but finds shelter among the rocks. The result is that he has practically no enemies save man to fear. “Often he spends the summer where the snow remains all the year through and his white coat is a protection from the keenest eyes. You see, when not moving, he looks in the distance for all the world like a patch of snow on the rocks. “Not having a handsome head or wonderful horns he has not been hunted by man quite so much as has Bighorn, and therefore is not so alert and wary. Both he and Bighorn are more easily approached from above than from below, because they do not expect danger from above and so do not keep so sharp a watch in that direction. The young are sometimes taken by King Eagle, but otherwise Billy Goat's family has little to fear from enemies, always excepting the hunter with his terrible gun. “I have now told you of the members of the cattle and Sheep family, what they look like and where they live and how. There is still one more member of the order Ungulata and this one is in a way related to another member of Farmer Brown's barnyard. I will leave you to guess which one. What is it, Peter?” “If you please, in just what part of the Far West are the mountains where Billy Goat lives?” replied Peter. “Chiefly in the northern part,” replied Old Mother Nature. “In the Northwest these mountains are very close to the ocean and Billy does not appear to mind in the least the fogs that roll in, and seems to enjoy the salt air. Sometimes there he comes down almost to the shore. Are there any more questions?” There were none, so school was dismissed for the day. Peter didn't go straight home. Instead he went up to the Old Pasture for another look at the old ram there and tried to picture to himself just what Bighorn must look like. Especially he looked at the hoofs of the old ram.