At the scene of Marat’s death, in an infamous cabaret in the old section of Paris, in an old abandoned château on the outskirts of the city, in a prison in the midst of the September massacres—the Scarlet Pimpernel and his League may be in all of these places, or they may be in none of them. In these eleven stories Chauvelin, Robespierre, and several other officials each make their...