Once upon a time there lived a King and a Queen who had one daughter called Rainbow. When she was christened, the people of the city were gathered together outside the cathedral, and amongst them was an old gipsy woman. The gipsy wanted to go inside the cathedral, but the Beadle would not let her, because he said there was no room. When the ceremony was over, and the King and Queen walked out, followed by the Head Nurse who carried the baby, the gipsy called out to them:

"Your daughter will be very beautiful, and as happy as the day is long, until she sees the Spring!" And then she disappeared in the crowd.

The King and the Queen took counsel together and the King said: "That gipsy was evidently a fairy, and what she said bodes no good."

"Yes," said the Queen, "there is only one thing to be done: Rainbow must never see the Spring, nor even hear that there is such a thing."

So an order was issued to the whole city, that if any one should say the word "Spring" in the presence of Princess Rainbow he would have his head cut off. Moreover, it was settled that the Princess should never be allowed to go outside the palace, and during the springtime she should be kept entirely indoors.

The King and the Queen lived in a city which was on the top of a hill, and had a wall round it, and the King's palace was in the middle of it. In the springtime Rainbow was taken to a high tower which looked on to the little round city, and from her window you could see the spires of the churches, the ramparts, and the broad green plain beyond. But a curtain made of canvas was fastened outside Rainbow's window, so that she could see nothing, and she was not allowed to go outside her tower until the springtime was over.

Rainbow grew up into a most beautiful Princess, with grey eyes and fair hair, and until she was sixteen all went well, and nothing happened to interfere with her happiness.

It was on her sixteenth birthday, which was in April, and she was sitting alone in her room, looking at her birthday presents, when she began to wonder for the first time why she was shut up in her tower during three months of the year, and why a curtain was placed outside her window, so that she could see nothing outside. Her mother and her nurse had told her that this was done so that she might not fall ill, and she had always believed it; but on that day, for the first time, she began to wonder whether there might be any other reason as well. It was a lovely Spring day, and the sun shone through the canvas curtain which was stretched outside Rainbow's open window; a breeze came into her room from the outside world, and Rainbow felt a great longing to tear aside the curtain and to see what was happening out of doors.