So he went up the river again a little way, and lay there the rest of the night under an alder root; but, when morning came, he longed to go down again to the big pool, and see whether Mr. Grimes had turned into a water-baby yet. So he went very carefully, peeping round all the rocks, and hiding under all the roots. Mr. Grimes lay there still; he had not turned into a water-baby. In the afternoon Tom went back again. He could not rest till he had found out what had become of Mr. Grimes. But this time Mr. Grimes was gone; and Tom made up his mind that he was turned into a water-baby. He might have made himself easy, poor little man; Mr. Grimes did not turn into a water-baby, or anything like one at all. But he did not make himself easy; and a long time he was fearful lest he should meet Grimes suddenly in some deep pool. He could not know that the fairies had carried him away, and put him, where they put everything which falls into the water, exactly where it ought to be. But, do you know, what had happened to Mr. Grimes had such an effect on him that he never poached salmon any more. And it is quite certain that, when a man becomes a confirmed poacher, the only way to cure him is to put him under water for twenty-four hours like Grimes. Then Tom went on down, for he was afraid of staying near Grimes: and as he went, all the vale looked sad. The red and yellow leaves showered down into the river; the flies and beetles were all dead and gone; the chill autumn fog lay low upon the hills, and sometimes spread itself so thickly on the river that he could not see his way. But he felt his way instead, following the flow of the stream, day after day, past great bridges, past boats and barges, past the great town, with its wharfs, and mills, and tall smoking chimneys, and ships which rode at anchor in the stream; and now and then he ran against their hawsers, and wondered what they were, and peeped out, and saw the sailors lounging on board smoking their pipes; and ducked under again, for he was terribly afraid of being caught by man and turned into a chimney-sweep once more. He did not know that the fairies were close to him always, shutting the sailors' eyes lest they should see him, and turning him aside from millraces, and sewer-mouths, and all foul and dangerous things. Poor little fellow, it was a dreary journey for him; and more than once he longed to be back in Vendale, playing with the trout in the bright summer sun. But it could not be. What has been once can never come over again. And people can be little babies, even water-babies, only once in their lives.