Sir: Alex Duvall Smith's article on diamonds (Magazine, 13 February) contains a serious error. Unita has never "set up joint operations with De Beers". De Beers operates in Angola in partnership with the Angolan government, through Endiama, the Angolan state diamond entity. De Beers has never had a commercial relationship with Unita.
W J LEAR
Director, Corporate Communications
De Beers, London EC1