XVII: Sonia's Escape"One of M. Formery's innocents," said Guerchard, turning to the Duke.
"The chalk?" said the Duke. "Is it the same chalk?"
"It's blue," said Guerchard, holding it out. "The same as that of the signatures on the walls. Add that fact to the woman's sudden realization of what she was doing, and you'll see that they were written with it."
"It is rather a surprise," said the Duke. "To look at her you would think that she was the most honest woman in the world."
"Ah, you don't know Lupin, your Grace," said Guerchard. "He can do anything with women; and they'll do anything for him. And, what's more, as far as I can see, it doesn't make a scrap of difference whether they're honest or not. The fair–haired lady I was telling you about was probably an honest woman; Ganimard is
