Catherine Bailey gave a talk about her best selling book Black Diamonds, the story of the Fitzwilliam family of Wentworth Woodhouse, who made their fortune from coal.  Catherine also talked about her latest book Secret Rooms, which explains the mysterious death of the 9th Duke of Rutland in 1940.  He died in a murky room next to the servants’ quarters at his family home, Belvoir Castle, a dark history kept hidden for over 60 years.