For those unfortunate enough to have missed the handsomely mounted Correggio and Parmigianino drawings exhibition, a collaborative effort by the British Museum and the Metropolitan Museum of Art, its equally handsome accompanying catalogue conveys its pleasures in that first virtual reality—a slim, illustrated book to be opened and examined at leisure. Although most, if not all, of the drawings on view in the exhibition and reproduced in its catalogue have been previously exhibited and published,...