"Ha!" cried Gil, pointing at him fiercely, "see him tremble, see his guilty looks! He knows that I speak true. The Mermaid helped him. He is half fish. He came out of the sea and was no real brother of mine, but a Merbaby. A Mermaid was his mother!"

At these words a whirring sound was heard in the air overhead, and a second time the Stork appeared, flapping across the scene out to sea, where he alighted upon the Round Rock. But Gil was too angry even to notice him.

"Gil, Gil, tell me how this can be?" begged Jan, going up to his brother and laying a pleading hand upon his arm.

But Gil shook him off, crying, "It is true! He is half fish and the sea-folk helped him. It was not a fair race. Let us try it again."

"Nonsense!" cried the other boys indignantly. "It was a fair race. Jan need not try again, for he is our champion. We will have it so."

But Jan was looking at Gil strangely, and the light was gone out of his eyes. His face was very white. "I did not know that you cared so much to win," he said to Gil in a low voice. Then he turned to the others. "If my brother thinks it was not a fair race let us two try again. Let us swim once more to the Round Rock and back; and the winner shall be declared the village champion." For Jan meant this time to let his brother beat. What did he care about anything now, since Gil hated him so much that he could tell that story?

"Well, let them try the race again, since Jan will have it so," cried the boys, grumbling and casting scornful looks at Gil, who had never been so unpopular with them as at this moment.

Once more the two sprang into the waves and started for the Round Rock, where the spray was dashing merrily over the plumage of the Stork as he stood there upon one leg, trying not to mind the wetness which he hated. For he was talking earnestly with a pretty Mermaid who sat on the rock in the surf, wringing her hands.

"It is he! It is he!" she cried. "I know him now. It is the lad whom they call Jan, the finest swimmer of them all. Oh, he dives like a fish! He swims like a true Sea-child. He is my own baby, my little one! I followed, I watched him. I could hardly keep my hands from him. Tell me, dear Stork, is he not indeed my own?"

The Stork looked at her gravely. "It is no longer a secret," he said, "for Jan has been betrayed. He who is now Jan the unhappy mortal boy was once your unhappy Sea-baby."