Now in those days, there lived a famous magician named Merlin, so powerful that he could change his form at will, or even make himself invisible; nor was there any place so remote that he could not reach it at once, merely by wishing himself there. One day, suddenly he stood at Uther's bedside, and said: "Sir king, I know thy grief, and am ready to help thee. Only promise to give me, at his birth, the son that shall be born to thee, and thou shalt have thy heart's desire." To this the king agreed joyfully, and Merlin kept his word: for he gave Uther the form of one whom Igraine had loved dearly, and so she took him willingly for her husband.
When the time had come that a child should be born to the king and queen, Merlin appeared before Uther to remind him of his promise; and Uther swore it should be as he had said.

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