When you were a bird you knew the fairies pretty well, and you remember a good deal about them in your babyhood, which it is a great pity you can't write down, for gradually you forget, and I have heard of children who declared that they had never once seen a fairy. Very likely if they said this in the Kensington Gardens, they were standing looking at a fairy all the time. The reason they were cheated was that she pretended to be something else. This is one of their best tricks.

Ch. 16 - The Little White Bird (1902)