He had met Sir John at Scarborough, or Fleetwood, or somewhere or other (if you don't care where, nobody else does), and had made acquaintance with him, and become very fond of his children. Now, Sir John know nothing about sea-cockyolybirds, and cared less, provided the fishmonger sent him good fish for dinner; and My Lady knew as little: but she thought it proper that the children should know something. For in the stupid old times, you must understand, children were taught to know one thing, and to know it well; but in these enlightened new times they are taught to know a little about everything, and to know it all ill; which is a great deal pleasanter and easier, and therefore quite right. So Ellie and he were walking on the rocks, and he was showing her about one in ten thousand of all the beautiful and curious things which are to be seen there. But little Ellie was not satisfied with them at all. She liked much better to play with live children, or even with dolls, which she could pretend were alive; and at last she said honestly, "I don't care about all these things, because they can't play with me, or talk to me. If there were little children now in the water, as there used to be, and I could see them, I should like that." "Children in the water, you strange little duck?" said the professor. "Yes," said Ellie. "I know there used to be children in the water, and mermaids too, and mermen. I saw them all in a picture at home, of a beautiful lady sailing in a car drawn by dolphins, and babies flying round her, and one sitting in her lap; and the mermaids swimming and playing, and the mermen trumpeting on conch-shells; and it is called 'The Triumph of Galatea;' and there is a burning mountain in the picture behind. It hangs on the great staircase, and I have looked at it ever since I was a baby, and dreamt about it a hundred times; and it is so beautiful that it must be true." But the professor had not the least notion of allowing that things were true, merely because people thought them beautiful. Now little Ellie was, I suppose, a stupid little girl; for she only asked the same question over again. "But why are there not water-babies?" I trust and hope that it was because the professor trod at that moment on the edge of a very sharp mussel, and hurt one of his corns sadly, that he answered quite sharply, forgetting that he was a scientific man, and therefore ought to have known that he couldn't know; and that he was a logician, and therefore ought to have known that he could not prove a universal negative--I say, I trust and hope it was because the mussel hurt his corn, that the professor answered quite sharply: "Because there ain't." Which was not even good English, my dear little boy; for, as you must know, the professor ought to have said, if he was so angry as to say anything of the kind--Because there are not: or are none: or are none of them; or because they do not exist.