Plus she goes into the sociology of the time which was still that the sins of the parents were responsible for deformities in the children. Therefore it was his mother's fault, and the fact that she was illigetimate, and her gradmother was a dancehall whore, that caused his deformity--or so she spins her case. Like I said, it's really compelling. I have read other Ripper stuff, they all make it sound compelling of course, but I have to say--her findings while sometimes a bit circumstantial, just make you sit back at the end and say--it's got to be him!
For me the most damning thing was his artwork, his weird correspondences with everyone, his own facination with Jack the Ripper, his secret studios that no one knew about, etc. etc. He was just a weird dude.