Thank you! Both those books are on my list from cherry-picking the bibliography to Lisa Duggan's Sapphic Slashers: Sex, Violence, and American Modernity (Duke UP, 2000), a book which is radically misrepresented by its (terrible) title,* but I am very glad to have confirmation.

And I completely understanding wanting to stay as far away from Ripperology as you can. It's fun to watch as an uninvested spectator, but it would be a nightmare to approach professionally as a historian. Kind of like the "Authorship Question."

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*I need to go blog about it here in a minute.