He sees the wand, puts two and two together - this must be what Sebastian meant by other magic users. The ones who use wands to cast those Patrony-whatsits, instead of their own blood. Though it's hardly the first time he's seen magic used since arriving in the city, it still makes his mind rebel.

"Yeah," he replies, handing over the papers to the other man to take, still a little baffled by what he'd seen. "You're a wizard?"