From Julian Lennon's YouTube channel...
Interesting comments by Cynthia, interviewed by Mike Wallace on the American 'news' program popular in the 1970s, 60 Minutes...
Mike: "Was he (John) writing music at this time? (late 1966 - 1967)"
Cynthia: "No. There was a period of great, great change in his life and he didn't know what direction it was going to take, but the direction was chosen for him, anyway."
Cynthia: "He was surrounded by weird people."
Cynthia: "Seeing this man, who wasn't John anymore, doing the wildest things."
Fennon? to a NY Times reporter: "I'm sorry that you liked your moptops."
I don't think there is any doubt that some closely held secrets about what happened to The Beatles have been further kept quiet with the death of Cynthia Lennon. We continue to hope that the whole truth will emerge someday.