Keen-eyed Hearst Castle guides spot key to painting’s long-lost author

The large painting of the Annunciation had been hanging on the walls of Hearst Castle in San Simeon, California, since 1927 when newspaper magnate William Randolph Hearst bought it the California decorating company Cannell and Chaffin. Other than the obvious — its subject and impressive size (8.5 feet high by five feet wide) — nothing …