I Am The Walrus - From a Lewis Carroll poem about a Walrus who tricks a generation of oysters to come to his house. Once there, he pounces and eats them. He's portrayed as evil character in the poem. He cries after eating them because there are no future generations to eat. Lennon is laughing (crying) because the psychedelic culture he promotes is destroying a generation. The eggmen are the people who tried to put Humpty Dumpty together again, Humpty Dumpty being the 60's generation.
The Beatles - I Am The Walrus,6th Nov 1967, Working at Abbey Road studio in London, The Beatles mixed four songs, ‘Hello Goodbye’, ‘Your Mother Should Know’, ‘Magical Mystery Tour’ and ‘I Am the Walrus’. Due to the radio feed used in ‘I Am the Walrus’ being recorded in mono, the song changes from stereo to mono at the line "Sitting in an English garden". More on 'I Am The Walrus'