Take one juicy slice of the art gallery scene. Pour in a world-class bottle of Pinot. Add an exotic dark-haired seductress. Season with soupçon of treachery and murder. Stir well. Whoever said a watched plot never boils. It's a tasty dish that's got Professor Jonathan Benjamin Franklin in hot water again. Whether it's art, women or the occasional stray body, as usual, he's flummoxed. But don't tell him. It was the dog who did it.