At the Back of the North Wind by George MacDonald

DIAMOND said nothing to his mother about his adventures. He had half a notion that North Wind was a friend of his mother, and that, if she did not know all about it, at least she did not mind his going anywhere with the lady of the wind. At the same time he doubted whether he might not appear to be telling stories if he told all, especially as he could hardly believe it himself when he thought about it in the middle of the day, although when the twilight was once half-way on to night he had no doubt about it, at least for the first few days after he had been with her. The girl that swept the crossing had certainly refused to believe him. Besides, he felt sure that North Wind would tell him if he ought to speak.

It was some time before he saw the lady of the wind again. Indeed nothing remarkable took place in Diamond's history until the following week. This was what happened then. Diamond the horse wanted new shoes, and Diamond's father took him out of the stable, and was just getting on his back to ride him to the forge, when he saw his little boy standing by the pump, and looking at him wistfully. Then the coachman took his foot out of the stirrup, left his hold of the mane and bridle, came across to his boy, lifted him up, and setting him on the horse's back, told him to sit up like a man. He then led away both Diamonds together.