No water-babies, indeed! Why, wise men of old said that everything on earth had its double in the water; and you may see that that is, if not quite true, still quite as true as most other theories which you are likely to hear for many a day. There are land-babies--then why not water-babies? _Are there not water-rats, water-flies, water-crickets, water-crabs, water-tortoises, water-scorpions, water-tigers and water-hogs, water-cats and water-dogs, sea-lions and sea-bears, sea-horses and sea-elephants, sea-mice and sea-urchins, sea-razors and sea-pens, sea-combs and sea-fans; and of plants, are there not water-grass, and water-crowfoot, water-milfoil, and so on, without end?_ "But all these things are only nicknames; the water things are not really akin to the land things." That's not always true. They are, in millions of cases, not only of the same family, but actually the same individual creatures. Do not even you know that a green drake, and an alder-fly, and a dragon-fly, live under water till they change their skins, just as Tom changed his? And if a water animal can continually change into a land animal, why should not a land animal sometimes change into a water animal? Am I in earnest? Oh dear no! Don't you know that this is a fairy tale, and all fun and pretence; and that you are not to believe one word of it, even if it is true? But at all events, so it happened to Tom. And, therefore, the keeper, and the groom, and Sir John made a great mistake, and were very unhappy (Sir John at least) without any reason, when they found a black thing in the water, and said it was Tom's body, and that he had been drowned. They were utterly mistaken. Tom was quite alive; and cleaner, and merrier, than he ever had been. The fairies had washed him, you see, in the swift river, so thoroughly, that not only his dirt, but his whole husk and shell had been washed quite off him, and the pretty little real Tom was washed out of the inside of it, and swam away, as a caddis does when its case of stones and silk is bored through, and away it goes on its back, paddling to the shore, there to split its skin, and fly away as a caperer, on four fawn-coloured wings, with long legs and horns. They are foolish fellows, the caperers, and fly into the candle at night, if you leave the door open. We will hope Tom will be wiser, now he has got safe out of his sooty old shell.