Lloyd Sullivan has spent almost two decades and as much as $1-million trying to prove that the portait his family has owned for more than four centuries is that of William Shakespeare. “Events in the last year have convinced Sullivan that his heirloom is within striking distance of being named an authentic lifetime likeness of Shakespeare. If he’s right, the painting could be worth as much as $20-million. Certainly it’s a claim that’s going to receive renewed attention this spring as a much-anticipated Shakespeare-themed art exhibition goes up in London.”