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How John Lennon learnt the harmonica

3 October 2012 Last updated at 18:09 BST

A saxophonist who played with Paul McCartney when he was with the pop group Wings has explained how he saw John Lennon pick up tricks for the harmonica.

Howie Casey said he was backstage after a concert when Delbert McClinton, a Texas roots musician, showed The Beatle how to bend notes.