Even James II.

was once a bewitching little creature in frocks with a skull-cap on his head.

His sister Mary, aged six, in a lace dress, with her hands folded in front of her, looks very good and grown-up.

When she became older, though not even then really grown-up, she married the William of Orange of our picture.

He came from Holland and stayed at the English Court, as a boy of twelve, and it was then that Van Dyck painted this portrait of him.
Later on, when they were married, Van Dyck painted them together, but William was older and looked a little less beautiful, and Mary had lost the charm of her babyhood.