My Old Friend Backstory - Carl Perkins with Paul McCartney 

The rest of the story as told by Carl Perkins in a 1996 interview with Goldmine magazine which ran in the 1998 Beatles edition: "She (Linda) said, "There's two people in the world that know what John Lennon said to Paul, the last thing he said to him. Me and Paul are the only two that know that, but now there's three...you know it. I said, "Girl, you're freaking me out!...She said the last words that John Lennon said to Paul in the hallway of the Dakota building were...he patted him on the shoulder, and said, "Think about me every now and then, old friend."'
• Carl Goldmine Interview