Take one juicy slice of the art gallery scene. Pour in a bottle of world-class Pinot. Add an exotic dark-haired seductress. Season with a soupcon of treachery and murder. Stir well. Who says 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 that did it.