Saddest Passage Among Lennon's Last Interviews

Q:  How did you and Paul happen to be watching TV together?
Lennon:  That was a period when Paul just kept turning up at the door
with a guitar.  I would let him in, but finally I said to him, "Please
call before you come over.  It's not 1956 and turning up at the door
isn't the same anymore."
-- from Lennon's Playboy interview of 1980
     A few years later, in their own Playboy interview, the McCartneys
mentioned that they had heard Lennon was having trouble writing music
and that McCartney had shown up to help Lennon.  Linda McCartney added
that Lennon had been going insane or some such -- which, judging from
the accounts of Goldman and John Green, was a fair assessment.