“On Nov. 18, 2005, “Winter in Springs,” a 40-by-32-inch drip painting attributed to Jackson Pollock, was stolen from the Everhart Museum of Natural History, Science and Art in Scranton, Pa. But “Winter in Springs” was never authenticated and is not in the the four-volume catalogue raisonné, or complete listing, of Pollock’s work, regarded as the definitive word on authenticity. Nor was it insured. Authenticated Pollock works of similar size sell for about $10 million.”