When I first poked around at the idea, I knew he was innocent and that he was needed to deal with certain clockwork devices. Now, I'm less sure of his innocence, and even less sure of what exactly his skills are needed for. Or even, in the end, if they are really needed. One of the other characters might be able to manage looking at his notes. . . .
Good thing he's mostly a MacGuffin. But I think it would probably help if I nailed it down. There may be ripple effects.