The letter, penned in the early 1970s, contains references to Who drummer Keith Moon and singer-songwriter Harry Nilsson misbehaving in Hollywood's Capitol Studios, while they were supposed to be recording with the ex-Beatle.

It reads: "Phil - See ya around 12.30! Should you not yet know, it was Harry and Keith who pissed on the console! We left at 11.30� Jerry now wants us to evict us or that's what Capitol tells us, anyway. Tell him to bill Capitol for the damage if any?