A draft of a six-page 1970 or '71 letter that is alternately affectionate and angry from John Lennon to fellow Beatle Paul McCartney and his wife Linda will come up for auction at Christie's London on Oct. 4, reports Reuters. It is expected to fetch in excess of $100,000. At the heart of the message, which is riddled with deletions, misspellings and swearing, is the shock of the historic 1970 breakup of the Beatles. Lennon's letter reportedly reveals the deep personal and financial rifts inside the band and accuses McCartney of letting success go to his head. "Of course we changed the world -- but try and follow it through -- get off your gold disc and fly," Lennon wrote. "I know the Beatles are 'quite nice people' -- I'm one of them -- they're also just as big bastards as anyone else, so get off your high horse." The letter also calls Linda McCartney (who was married to Paul until her death from breast cancer in 1998) "cranky" and "middle-aged," and predicted that the union would not last. On the other hand, Lennon, referring to himself and wife Yoko Ono (whom he accuses McCartney of disdaining), signs off on the letter, "love to you both from us two." A spokeswoman for Christie's said the current owner of the letter, who purchased it in 1990, is anonymous.