"Oh, tell me that name!" begged the Mermaid.

But the Stork only cried, "I must not tell. I have told too much already," and he was gone.

"Oh, then I will love all fisher-boys for his sake," sobbed the Mermaid as she dived down into the sea. "And some day, some day I shall find him out; for my baby is sure to be the finest of them all."

Now the years went by, and the parents of Gil and Jan were dead. The two brothers were tall and sturdy and stout, the finest lads in the whole country. But as their shadows grew taller and broader when they walked together across the sand, so another shadow which had begun to fall between them grew and grew. It was the shadow of Gil's selfishness and jealousy. So long as Jan was smaller and weaker than he, Gil was quite content, and never ceased to be grateful for the little brother who had come to be his playmate. But suddenly, as it seemed, he found that Jan was almost as big as himself; for the boy had thriven wondrously, though there were still several years which Jan could never make up. Gil was still the leader, but Jan was not far behind; and Jan himself led all the other boys when his brother was not by. Every one loved Jan, for he was kind and merry, while Gil was often gloomy and disagreeable. Gil wanted to be first in everything, but there began to be some things that Jan could do better than he. It made Gil angry to hear his brother praised; it made him sulky and malicious, and sometimes he spoke unkindly to Jan, which caused the blue eyes to fill with tears. For, big fellow though he was, Jan was five years younger, and he was a sensitive lad, loving Gil more than anything else in the world. Gil's unkindness hurt Jan deeply, but could not make him love his brother less.

Both boys were famous swimmers. Gil was still the stronger of the two, and he could outswim any lad in town. As for Jan, the fishermen declared that he took to the water like a fish. No one in all the village could turn and twist, dive and glide and play such graceful pranks, flashing whitely through the waves, as did Jan. This was a great trouble to Gil, who wished to be foremost in this as in everything else. He was a selfish fellow; he had wanted a playmate to follow and admire him. He had not bargained for a comrade who might become a rival. And he seemed to love his brother less and less as the days went by.

One beautiful summer day Gil and Jan called together the other boys, the best swimmers in the village, and they all went down to the bay to swim. They played all sorts of water-games, in which the two brothers were leaders. They dived and floated and chased one another like fishes through the water. Jan, especially, won shouts of applause for his wonderful diving, for the other boys liked him, and were proud of him, glad to see him win. This again made Gil jealous and angry. Jan dived once more and remained under water so long that the boys began to fear that he would never come up; and in his wicked heart Gil half hoped that it was to be so. For it had come about that Gil began to wish he had no brother at all. So different was he from the boy who made the eager bargain with the good old Stork.

At last Jan's head came out of the water, bubbling and blowing, and the boys set up a cheer. Never before had any one in the village performed such a feat as that. But Jan did not answer their cheers with his usual merry laugh. Something was troubling him which made him look strange to the others. As soon as he reached the shore he ran up to Gil and whispered in his brother's ear a curious story.

"Oh, Gil!" he cried. "Such a strange feeling I have had! Down below there as I was swimming along I seemed to hear a strange sound like a cry, and then, surely, I felt something cling close to me, like soft arms. Gil, Gil, what could it have been? I have heard tell of the Mermaidens who are said to live in these waters. Some even say that they have seen them afar off on the rocks where the spray dashed highest. Gil, could it have been a Mermaid who touched me and seemed to pull me down as if to keep me under the water forever? I could hardly draw away, Gil. Tell me what you think it means?"

Gil was too angry at Jan's success to answer kindly. He sneered, remembering the secret which only he and the Stork knew.

"There are slimy folk, half fish and half human, people say. The less one has to do with them the better. I think you are half fish yourself, Jan. It is no credit to you that you are able to swim!" So spoke Gil, breaking the promise which he had once given.