Cade took his time answering because, in all honesty, he didn't know if the box Weasley had said he'd seen took anything more than what was contained in those dark spots removed from the victims. And, well, the victims weren't around to ask, were they? If Cade had to hazard a guess, though, he's go with no, so that's what he told Agatha. But he felt the need to tack on, "Not that we know of. Thirteen."