EVANSVILLE, Ind.–A call from a New York art dealer about a glass sculpture by Pablo Picasso to a museum in Evansville, Ind., led the museum to search its holdings and unravel a bizarre mystery of a hidden treasure. •By Michael Wheatley, Evansville Museum of Arts, History and Science Pablo Picasso’s Seated Woman with Red Hat, a fired-glass piece kept in storage nearly 50 years, was only recently discovered to be genuine. By Michael Wheatley, Evansville Museum of Arts, History and Science Pablo Picasso’s Seated Woman with Red Hat, a fired-glass piece kept in storage nearly 50 years, was only recently discovered to be genuine. Arlan Ettinger, of the art broker/auctioneer…