His eyes skim the brand names, head tilted as he reads, and he imagines even he can concoct the adequate potions that would prevent infection; but he isn't going to tell her this or anything. If Lucius' cynicism to her methods is honest, then he can't imagine there wouldn't be a little bit of that in return, for whatever reason.

"You are working charitably, I take it?" is his question, naturally, despite their surroundings and the apparent state of him. He lifts attention off the page to her. "Otherwise, I can pay you in ten days."