"Well, Pete," said Uncle Henry briskly, "you'll find _Pegasus_, the horse, grazing clear on the other side of the star field. Somebody built a box stall for him over there, but he's so big and strong that he doesn't stay in it except when he feels like it. He's all the time leaping the fence and escaping. When you find him, you'll see that he's doing that very thing now. In fact, you'll catch him right in the act!" "Oh, let's hurry then!" said Peter, "he might be out before we see him do it!" "Everybody find the big dipper," directed Uncle Henry. "You remember how we found the pole star in the tip of the little bear's tail by drawing a line up through the 'pointer stars' of the dipper's bowl, on the side away from the handle? Well, do that again now, and follow the line through the pole star, passing behind _Cassiopeia_ in her chair, and continuing until your line passes through two fairly bright stars quite a distance apart. (23) A line connecting these stars marks the top edge of _Pegasus'_ box stall, which is called 'the square of _Pegasus_.'" "_Cassiopeia_ is about halfway between the pole star and _Pegasus_. A line drawn from the pole star through the back of _Cassiopeia's_ chair will reach the two stars that form the lower corners of _Pegasus'_ box stall." (24) "Oh, I see the square now," said Peter. "Me, too," said Paul. "It's very big, isn't it?" said Betty. "Yes," agreed Uncle Henry, "and _Pegasus_ is big, too. He is upside down just now, with his head just above the western horizon. His nose points northward toward _Delphinus_ and his neck curves up from the side of the box stall that's away from the pole star. His fore feet curve up from the side of the square that is toward the pole star, and both feet point toward the swan." "I see him now," cried Peter, and began putting in the chalk dots and lines for the framework of the box stall and the skeleton of _Pegasus'_ head and forelegs, which are all of him that can be seen. As Uncle Henry said, _Pegasus_ is just in the act of jumping out of his stall. When Peter had finished drawing _Pegasus_, the horse of poets looked like this. Uncle Henry put in the arrows pointing from the pole star, and the skeletons of _Delphinus_ and the swan. [Illustration] "It seems to me," observed Paul sagely, "that _Pegasus'_ box stall is a lot too small for him." "That's why he is all the time jumping out and running away," explained Uncle Henry. "I told you that we should catch him in the act. He's always at it." "Pete's had his turn; now I want to find the ram and the little dog," said Paul. "If you'll wait just a little longer," said Uncle Henry, "I'd like to show Betty the last of the sky ladies, because she's right close to _Pegasus_." Paul's face fell a little, but he said, "Ladies first, of course," as any gentleman would.