Ahead of the publication of #CharlesSpencer’s new book, 'Swan Song: Diana, My Sister,' a preview has been published by the Daily Mail. In the book, Spencer recalls a phone call with the now-#KingCharles after a disagreement about #PrinceWilliam and #PrinceHarry, then 15 and 12, walking behind their mother, #PrincessDiana’s, coffin at her funeral procession. Tap the link for more.