London is smoking hot, and not in a good way. It's the Autumn of 1666, and the Great Fire is still burning, the ashes of hundreds of houses and shops and St. Paul's Cathedral choking the air. The people, too, are choking, raging at the French, the Dutch, at the foreigners who--they are certain--lit the torch. Lord Arlington, the Secretary of State, might conceivably be interested in harnessing this anger: It can be so useful, at times,...