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In January of 1994, Paul McCartney received a parcel from John Lennon's widow, Yoko Ono. The package contained 2 cassette tapes featuring songs that Lennon had written in the late 70's and recorded in his home studio as demos for later studio work. The first tape contained the songs "Free as a Bird" and "Real Love". The second tape, marked "for Paul", contained John Lennon’s rough demo for two unfinished song he was writing, "Grow Old With Me" and “Now and Then”.

The remaining Beatles reunited in 1995 to record new music for a project which would be called Antholgy 1. The remaining trio finished the songs on the first tape, releasing them as new Beatle music when the double-album was released in November, but the second two songs were left unfinished. The original plan was to finish the remaining two songs along with “Free as a Bird” and “Real Love”. But, after 2 days working on the tracks, George Harrison decided he didn’t like the way it was going and pulled out.

So… the last unfinished Beatles tracks were never released. As if he was responding to Lennon's wish, McCartney had repeatedly stated that he’d like to finish the tracks “one of these days”.

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While an orchestrated version of "Grow Old With Me" was released on the posthumus 1998 Lennon box set, "Now And Then" (also known as "I Don't Want To Lose You" or "Miss You")  has remained a bit of a mystery. Throughout 2005 & 2006 rumors ran wild that McCartney and Ringo Starr, the two remaining Beatles would release a completed version of the song. But to this date, no completed version has materialized. During a documentary on Jeff Lynne shown on BBC Four in October of 2012, McCartney stated he would love to re-enter the studio to complete work on the original track, with Lynne as the producer.

A popular fan remix from 2007 called the "1995 edit" consists of Lennon's original demo along with instrumental overdubs by an unspecified artist and samples from various 1960s Beatles songs. Contrary to repeated misconception, this remix does not contain any of the work that the three surviving members of the Beatles recorded in the 1990s.