Katherine Worsley's marriage in 1961 to the Duke of Kent plunged her into a life for which she was ill prepared. But as her children grew up - particularly after a miscarriage and a termination, signs of strain began to show. She did not flinch from essential duties, but she often looked like a haunted, hunted woman.The Duchess was finally diagnosed as suffering from ME - from which she has since made a recovery. But the greatest evidence of her inner crises was her conversion to the Roman Catholic church in 1992 - since when she has regained much of her calm, public dignity.