J. M. Barrie 
Peter Pan in Kensington Gardens [EPUB ebook] 

Peter Pan
If you ask your mother whether she knew about Peter Pan when she was a little girl she will say, "Why, of course, I did, child, " and if you ask her whether he rode on a goat in those days she will say, "What a foolish question to ask, certainly he did." Then if you ask your grandmother whether she knew about Peter Pan when she was a girl, she also says, "Why, of course, I did, child, " but if you ask her whether he rode on a goat in those days, she says she never heard of his having a goat. Perhaps she has forgotten, just as she sometimes forgets your name and calls you Mildred, which is your mother's name. Still, she could hardly forget such an important thing as the goat. Therefore there was no goat when your grandmother was a little girl. This shows that, in telling the story of Peter Pan, to begin with the goat (as most people do) is as silly as to put on your jacket before your vest.
Of course, it also shows that Peter is ever so old, but he is really always the same age, so that does not matter in the least. His age is one week, and though he was born so long ago he has never had a birthday, nor is there the slightest chance of his ever having one. The reason is that he escaped from being a human when he was seven days' old; he escaped by the window and flew back to the Kensington Gardens.
If you think he was the only baby who ever wanted to escape, it shows how completely you have forgotten your own young days. When David heard this story first he was quite certain that he had never tried to escape, but I told him to think back hard, pressing his hands to his temples, and when he had done this hard, and even harder, he distinctly remembered a youthful desire to return to the tree-tops, and with that memory came others, as that he had lain in bed planning to escape as soon as his mother was asleep, and how she had once caught him half-way up the chimney. All children could have such recollections if they would press their hands hard to their temples, for, having been birds before they were human, they are naturally a little wild during the first few weeks, and very itchy at the shoulders, where their wings used to be. So David tells me.