“Nobody has knocked,” she replied. “But I heard someone in the outer room.”

“Was it a man or a woman?”

“A woman. I heard the rustling of her gown.”

“A rustling like silk?”

“Yes, like silk.”

Madame Fosco had evidently been watching outside. The mischief she might do by herself was little to be feared. But the mischief she might do, as a willing instrument in her husband’s hands, was too formidable to be overlooked.