Churchill--Jack London--Frida Kahlo--Henry VIII--more to be done

I have recently been sent very interesting emails about the four people above as possible/probable syphilitics. Someone at Princeton emailed that Frida Kahlo had a positive Wassermann test. I read the biography she suggested, and there is work to be done there. Jack London was new to me-- a suggestion from someone on a sailboat last week. (The first Google search brought up Jack the Ripper as well). Henry VIII would have been a chapter in Pox if I had more space. The question here: how did psychological manifestations change over the centuries, referring to the essay by Hare suggesting that paresis was a late 18th century development.

I had not seen Randolph Churchill questioned (though how much Winston knew and what it meant to him is an interesting sideline) -- until I came across this website on Churchill's syphilis. LORD RANDOLPH CHURCHILL: MALADIES ET MORT:"It is impossible to say at this late date what killed Sir Winston Churchill's father. But it is no longer possible to say that he died of syphilis."
I'll comment on that when I have a chance. On first read I note that the author discounts the diagnosis because Jenny and the sons were not infected. Since syphilis was only infectious for the first few years, this does not follow, though it is often given as an argument that if the wife was healthy, the husband must have been as well. A recent article in the Oscar Wilde newsletter INTENTIONS made that argument. This article presents a very clear-cut case of GPI or paresis, in the context of denying it.