Drawing is the preferred mode of art making for Francesco Clemente, the mode in which he is most at home. This exhibition traced the development of Clemente’s drawings, in a variety of media, from the early ’70s through the present. Each one is an introspective fragment, sometimes dashed off in a single gesture as though the hand never left the paper, sometimes elaborated almost to opulence, with an oddly excruciating intensity that is inflammatory beyond what it images. Almost every drawing seems awkward and elegant at once, mingling an air of jaunty impertinence with labored delicacy. And the