After what had happened Martin could never visit the waterside and look at the great birds wading and swimming there without a feeling that was like a sudden coldness in the blood of his veins. The rosy spoonbill he had killed and cried over and the great bird-cloud that had frightened him were never forgotten. He grew tired of shouting to the echoes: he discovered that there were even more wonderful things than the marsh echoes in the world, and that the world was bigger than he had thought it. When spring with its moist verdure and frail, sweet-smelling flowers had gone; when the great plain began to turn to a rusty-brown colour, and the dry hard earth was full of cracks, and the days grew longer and the heat greater, there came an appearance of water that quivered and glittered and danced before his wondering sight, and would lead him miles from home every day in his vain efforts to find out what it was. He could talk of nothing else, and asked endless questions about it, and they told him that this strange thing was nothing but the Mirage, but of course that was not telling him enough, so that he was left to puzzle his little boy-brains over this new mystery, just as they had puzzled before over the mystery of the echoes. Now this Mirage was a glittering whiteness that looked just like water, always shining and dancing before him and all round him, on the dry level plain where there was no water. It was never quiet, but perpetually quivering and running into wavelets that threw up crests and jets of sprays as from a fountain, and showers of brilliant drops that flashed like molten silver in the sunlight before they broke and vanished, only to be renewed again. It appeared every day when the sun was high and the air hot, and it was often called _The False Water_. And false it was, since it always flew before him as he ran, so that although he often seemed to be getting nearer to it he could never quite overtake it. But Martin had a very determined spirit for a small boy, and although this appearance of water mocked his efforts a hundred times every day with its vanishing brightness and beauty, he would not give up the pursuit.