A drawing by one of the most famous German artists in history turned up in Massachusetts and is set to be officially cataloged for the first time. It could also be worth a cool $10 million, according to one expert. Only a handful of finished drawings depicting the Virgin and Child were ever completed by one of the most important artists of the Northern Renaissance, Alberich Dürer (1471 to 1528). One such drawing, hitherto unpublished, has now come to light from a private Massachusetts collection: “The Virgin and Child with a Flower on a Grassy Bench” (circa 1503). There was also some excitement going around as to how it was found. The highly refined drawing of unmistakable quality and in exceptional condition attests to Dürer’s “introspective” creative process: stretching many years, seeking artistic truth. It typifies his preoccupation with the Virgin and Child—a motif that reached its height just a few …