Aargh, I can't believe I missed this thread.
My thought about this version of the book was that it turned it into a classic 'nasty uppity woman is punished by being raped and killed' narrative. It did this by making Anne so shallow and nasty, and making so much of the rape scene. (Did Henry rape Anne in the book? I don't remember.)
Kim, the Flanders mare quote doesn't appear till later (17th c I think) so is probably made up, though it is the case that Henry simply didn't fancy Anne of Cleves.
Badvoc, do you think Norfolk pulled the strings to get Katherine Howard on the throne? I think he went along with it after it was clear that was who Henry was going for, rather than instigating it. But I'm prepared to be convinced. On the one hand - Norfolk is generally too careful to use someone so ill-prepared (and with that past). On the other, he might have thought she'd be easier to control than, say, his daughter Mary who he complained about being wiser than a woman should be.
I am a bit obsessed with Norfolk at the moment.
I'm currently reading Suzannah Dunn's Anne Boleyn novel and not liking it as much as I liked her Katherine Howard one. Anyone else read any of hers?