The late Beatle writes: "Yoko can explain her music better in person - this is a kind of introduction. She was trained as a classical musician and took music composition in Sarah Lawrence College as her major. It's far out, but don't let it frighten you."

The item was sold by RR Auction in Boston last week. Other lots included Beatles stock transfer sheets from 1969 ($16,000), Stairway To Heaven sheet music autographed by Led Zeppelin ($13,000), a Fender bass owned and used by Dee Dee Ramone ($38,000) and a Crosby, Stills and Nash Daylight Again gold disc ($245).