In comparison, nobody's ever really used the words 'cautious' and 'Jonathan Strange' together in the same sentence. He's already dreaming of what this could mean and how he could use it to his own devices.

"If that was the case, you'd think they would have sent us a note. An item that renders the wearer unseen, unheard, and unfelt...I'd guess they'd want me to be a spy or a bank robber with something like that."

Says the man who even after death and a stint of being crazy in the woods, still hasn't lost the bearings of an academic. Strange doesn't even have to say it: he'd be a shit spy.