Daniel Waterhouse and Johann von Hacklheber, at the same instant, filled their lungs and opened their mouths to explain to her that she was wrong. But each hesitated, thinking to let the other speak first, and so the next voice heard was Caroline’s. "You are about to curdle my blood with Mobb-tales, I know," she said. "But to me the notion is philosophically offensive. Doctor Leibniz has given much deep thought to the question of collective entities, such as a herd of sheep, and concluded that these must be regarded as aggregations of monads. What is true of a herd of sheep is more true of a Mobb of Londoners. They are all individual souls. This Mobb is a fabrication of minds too lazy to treat them as such."