Finally, a driver, Farmer Weathersky, accepted the boy and told him to get on his sleigh, whereupon it flew off into the air.
He found a hag in the forest, and she consulted all the animals and was unable to tell him where to find Farmer Weathersky.
They were chased by a flock of crows, but the father threw down the hairs, and they turned to ravens that drove them off.
When it was time for the fair, the son turned into a horse and told his father not to sell him with the headstall.
The boy turned into a dove, and Farmer Weathersky into a hawk, but a princess saw the chase and said he should come in her window.
White's The Once and Future King and the Disney 1963 animated film based on it, The Sword in the Stone.