Right as a trivet (pg. 312) -- Initially "as steady as a trivet", implying stability. In the book, "right as rain" might have fit the sentence better, though.
I enjoyed this story very much, and especially the observations on post-ware life in London.
I should have realized there was gonna be a sequel!
"Of course I understand sarcasm," she spat. "It's not like it's theoretical physics, is it?" -- pg. 373