NEW : William 's brother Harry is delighted to be getting a sister at last , he says . New York Times bestselling author and screenwriter David Foster Wallace died on April 19 after suffering from cancer for several years. The engagment ring his mother , Diana , wore was last seen in public in 1996 . They started dating a year later . The wedding is planned for the spring or summer of 2011 .
NEW : William 's brother Harry is delighted to be getting a sister at last , he says . New York Times bestselling author and screenwriter David Foster Wallace died on April 19 after suffering from cancer for several years. The engagment ring his mother , Diana , wore was last seen in public in 1996 . The wedding is planned for the spring or summer of 2011 .