This site covers the original British Beatles Albums plus analyses of the lyrics of non-album tracks.
Information on how the Beatles wrote the lyrics to their songs on The Beatles (white album) can be navigated from below the album cover.
Beatles Album: The Beatles AKA The White Album : Track 3
Lyrics: Lennon, McCartney
The walrus was Paul! The lyrics of glass onion was written by John as a fun song that responded to all the rumors about hidden meanings of songs such as 'fixing a hole' and 'there's a place'.
The glass onion song borrows heavily from previously controversial Beatles songs, and references Strawberry fields, the fool on the hill, I am the walrus. To these songs he added new tantalizing references for the people searching hidden meanings in his songs. Bent back tulips was a reference to secretly spying on people 'see how the other half live'. Cast Iron shore is a beach in Liverpool; a dove tail joint speaks for itself.
As for the term Glass onion? Well this refers to a group that the Beatles had signed to their apple lable. John wanted to call the group Glass Onion, but they didn't like this name and eventually named themselves as Badfinger.
John Lennon: Vocals, Acoustic guitar.
Paul McCartney: Piano, Bass guitar, Flute
George Harrison: Lead guitar
Ringo Starr: Drums, Tambourine