The night was hot in Paris. Breathless heat had brooded over the city all Saturday, the 23rd of August, 1572. It was the eve of Saint Bartholomew. The bell of Saint Germain l'Auxerrois had just clashed out the signal. The Louvre was one blaze of lights. Men with lanterns and poleaxes, as if going to the shambles to kill oxen, hurried along the streets.