Since the sisters were very much alike, the prince was in doubt. That night he put his sword between them, and said: "If you are my wife, this sword will get warm; if not, it will stay cold."
In the morning when he rose up, the sword was as cold as when he put it there.
It happened, when the two sisters were walking by the seashore, that a little cowboy was down by the water minding cattle, and saw Fair push Trembling into the sea; and next day, when the tide came in, he saw the whale swim up and throw her out on the sand. When she was on the sand she said to the cowboy: "When you go home in the evening with the cows, tell the master that my sister Fair pushed me into the sea yesterday; that a whale swallowed me, and then threw me out, but will come again and swallow me with the coming of the next tide; then he'll go out with the tide, and come again with to-morrow's tide, and throw me again on the strand. The whale will cast me out three times. I'm under the enchantment of this whale, and cannot leave the beach or escape myself. Unless my husband saves me before I'm swallowed the fourth time, I shall be lost. He must come and shoot the whale with a silver bullet when he turns on the broad of his back. Under the breast-fin of the whale is a reddish-brown spot. My husband must hit him in that spot, for it is the only place in which he can be killed."
When the cowboy got home, the eldest sister gave him a draught of oblivion, and he did not tell.
Next day he went again to the sea. The whale came and cast Trembling on shore again. She asked the boy "Did you tell the master what I told you to tell him?"
"I did not," said he; "I forgot."
"How did you forget?" asked she.
"The woman of the house gave me a drink that made me forget."
"Well, don't forget telling him this night; and if she gives you a drink, don't take it from her."
As soon as the cowboy came home, the eldest sister offered him a drink. He refused to take it till he had delivered his message and told all to the master. The third day the prince went down with his gun and a silver bullet in it. He was not long down when the whale came and threw Trembling upon the beach as the two days before. She had no power to speak to her husband till he had killed the whale. Then the whale went out, turned over once on the broad of his back, and showed the spot for a moment only. That moment the prince fired. He had but the one chance, and a short one at that; but he took it, and hit the spot, and the whale, mad with pain, made the sea all around red with blood, and died.