“Is it possible that for 40 years the National Gallery of V ictoria has been sitting on a masterpiece by Leonarda da Vinci worth millions of dollars? It’s an unlikely outcome, but the Renaissance master is one of several names suggested by art experts keen to pre-empt today’s announcement by the NGV of a major discovery among its 16th century paintings. … art consultant and valuer David Hulme said such works ‘can achieve into the millions of dollars’ … ”