Usually the thing that interests us most is something that we haven't got ourselves. It is that way with Peter Rabbit. Peter is not naturally envious. Oh, my, no! Peter is pretty well satisfied with what he has, which is quite as it should be. There is only one thing with which Peter is really dissatisfied, and it is only once in a while, when he hasn't much of anything else to think about, that he is dissatisfied with this. Can you guess what it is? Well, it is his tail. Yes, Sir, that is the one thing that ever really troubles Peter. You see, Peter's tail is, nothing but a funny little bunch of cotton, which doesn't look like a tail at all. The only time he ever sees it is when he is back to the Smiling Pool and looks over his shoulder at his reflection in the water, and then, of course, he really doesn't see his tail itself. So sometimes when Peter sees the fine tails of his neighbors, a little bit of envy creeps into his heart for just a little while. Why, even little Danny Meadow Mouse has a real tail, short as it is. And as for Happy Jack Squirrel and Reddy Fox and Bobby Coon and Jimmy Skunk, everybody knows what beautiful tails they have. Once Peter thought about it so much that Grandfather Frog noticed how sober he was and asked Peter what the trouble was. When Peter told him that it seemed to him that Old Mother Nature had not been fair in giving him such a foolish little tail when she had given others such beautiful ones, Grandfather Frog just opened his big mouth and laughed until he had to hold his sides. "Why, Peter," said he, "you look so sober, that I thought you really had something to worry about. What would you do with a big tail, if you had one? It would always be in your way. Just think how many times Reddy Fox or old Granny Fox have almost caught you. They certainly would have before this, if you had had a long tail sticking out behind for them to get hold of. I had a long tail when I was young, and I was mighty glad to get rid of it." After he heard that, Peter felt better. But he didn't lose interest in tails, and he spent a great deal of time in wondering why some of his neighbors had big, bushy tails and some had long, slim tails and why he himself had almost no tail at all. So when Paddy the Beaver came to live in the Green Forest, and made a pond there by building a wonderful dam across the Laughing Brook, the first thing Peter looked to see was what kind of a tail Paddy has, and the first time he got a good look at it, his eyes popped almost out of his head. He just stared and stared. He hardly noticed the wonderful dam or the equally wonderful canals which Paddy had made. All he could think of was that great, broad, flat, thick tail, which is so unlike any tail he had ever seen or heard of. The very next morning he hurried over to the Smiling Pool to tell Grandfather Frog about it. Grandfather Frog's big, goggly eyes twinkled.