That is so, is it not?" This was news to me and glancing sideways at Poirot, I fancied that it was news to him as well. 
I imagined he hadn't already known about the crime.
mnli hypothesis: I imagined he hadn't already known about the crime. premise: That is so, is it not?" This was news to me and glancing sideways at Poirot, I fancied that it was news to him as well. 