John Lennon wrote this blistering letter to the McCartneys in 1971, when tensions over The Beatles' breakup were still running very high. The letter goes up for auction soon, and thus it has hit the web and our eyes 40 years or so after it was written. The relationship between the two most famous songwriters ever is still fascinating, even after all this time...

It's a little hard on the eyes; for the full transcript, head here.