Having set Murder at Cirey at and around this château in the Haute Marne that was once the home of Madame du Châtelet, I'm back in a beautiful summer evening for more research in the area. Here the attractive building (added to in the 19th century) is seen from the farm, which in Emilie du Châtelet and Voltaire's day provided all the essentials and many of the luxuries they required for their privileged style of life.