Well, to think of your not understanding that! I am bound to say that when I was of your age I was just as ignorant about it as you are now, but then, children now have a good many more advantages than they had in my day. Considering how few advantages we had, it is a great credit to people of my age that we know anything at all, and, considering how many of them you have, it is a disgrace to you that you do not know everything.
When I was a child I used to read about fairies, and the book would say that they were six inches tall, or that they were about as big as a man's thumb, or it would tell about their sitting in flowers. And then I would look at the pictures and they would appear to be as high as a man's knees, or even higher. And I could not understand it. But I made up my mind to find out about it. That is what you must do, when there is anything that you don't understand. There are very few things that you can't do, if you make up your mind to them, except things that are too hard for you. I hate to have morals getting into a story as much as you do, but that is such a good one that it might as well go in.
Now I will tell you. Fairies can be of any size they like, and you never can tell what size they are going to be, from one minute to another. They can be giants, if they like. And as soon as they had Kathleen with them they could make her of any size they liked too. So as long as she was among them they could keep her and themselves just the same size, or as near to it as they liked.
But when fairies are not taking the trouble to be of any particular size--when they are letting themselves alone, as you might say--then they are about six inches tall. And I think that is a very good size to be. It would be better if you were of that size. You wouldn't eat so much and you wouldn't be so much in the way, and you would be much better-looking. Just think: if your face were only three-quarters of an inch long, all those features of it that are so disagreeable wouldn't show so plainly. You might even look rather pretty. You wouldn't need to be so, but you might look so.
And it would be so much easier to know where you were, if you were of that size, that it would save your mother a good deal of trouble. All she would have to do would be to put you on the mantelpiece, and then you could not get off without breaking your necks--and that would be such an advantage. I don't mean that it would be an advantage to break your necks, because then who would read this book, and why should I take all this trouble to write it? I mean, it would be an advantage that you could not get off. Well, now you see how much better off you would be if you were only six inches tall, and now you understand about the fairies.