Thanks to the correspondent who alerted me to this: the pictures seem to show that Ray's lecture was well-attended and I only wish I could have been there myself. I do hope that the answer to this gentleman's question
is yes one way or the other.
Pending that opportunity, I don't know if anybody can tell us: did any of the people attending ask any useful questions? Like, for instance, "why did you lie to Viktor Korchnoi and break your contract with him in order to write an instant book of the match?"
Come on, Ray, it's been nearly forty years now. Isn't it time to confess?