"The discovery of the “GOLDBRICK” VARIATIONS was an especially important one for a couple of reasons, both of them important. In the first place, it is a theme with variations, and P.D.Q. Bach’s use of this very usual eighteenth-century form was unusually unusual. And this piece is no exception. Because usually, when a composer writes a theme and variations, he presents the theme first, and then the variations. You sort of get used to that. Well, not P.D.Q. Bach. He presents all three variations...