Conversation so far:
What were the orgins of The Beatles' Free as a Bird song?
Paul McCartney, George Harrison and Ringo Starr wanted to record incidental background music for The Beatles Anthology project.
What did The Beatles' realize about Free as a Bird?
Paul McCartney, George Harrison and Ringo Starr realized that they wanted to record new music incorporating John Lennon's unreleased recordings.
What kind of sound is the song free as a bird inspired by
why is the 1995 song by the Beatles called free as a bird
Who was involved with The Beatles' Free as a Bird song originally?
Free as a Bird was recorded by John Lennon in 1977, in his and Yoko Ono's Dakota building apartment in New York City, but was not complete.
Is there anything else interesting about The Beatles' Free as a Bird song?
Free as a Bird was the Beatles' 34th Top 10 single in the United States, meaning they had at least one Top 40 hit in four different decades.

Question: what were the four songs
Self-contained rewrite: What were John Lennons' four songs on the cassette containing Free as a Bird?