It wasn't/couldn't have been laid open on that page Lookout because the distribution of the pages doesn't match!
Also, blood dries quickly and the blood was still a little tacky because there is a slight mirror image on the opposite page., there wouldn't be if the bible had been laid on the floor on that page!
Yes I understand about the placement of the Bible and its faint image on the opposite page but why was there ever reference made to a particular passage in the Bible allegedly relevant in the way Sheila led her life then died when the book itself was just placed randomly on it's pages ? Because there happened to have been blood on that particular part/page doesn't mean to say that she was reading it.
What I'm saying is that somewhere among the accusations towards JB there was something that stated that he knew on what page to leave the Bible open at.
Would that have been the time when the Bible was found on her chest, or on the floor ? If found on her chest I'd assume it would have been closed, which could well have been the time when the image could have been impressed on the opposite side.
It's always been a mystery and will remain so until such time that the case can again be scrutinised.