here's a recount - I am sitting with Hank in a restaraunt in NYC, ca. 1977, interviewing him. This is from memory, and I honestly do not remember how it came up, but here it is (and Jones confirmed this story on a later occassion):
"Athur Miller was not nice to Marilyn Monroe. I played the piano when she sang happy birthday to President Kennedy in Madison Square Garden. Afterwards the three of us were in an elevator, myself, Monroe and Arthur Miller. She was very drunk and he slapped her. Hard."
Hank is in his 50's, far from senile or delusional. As an added detail Al Haig was sitting with us when he made the comment, and Haig and I talked about it a few times afterwards. I really see no way that Jones can be mistaken about this. And it's not really all that shocking or surprising that Miller might continue to have contact with Monroe after the divorce or feel proprietary. That's show biz, as they say, and that's a not untypical male attitude -
what likely triggered it was, married or not, her flirting witht he president - and their were real rumors about Monroes's affair with JFK -