Behind-the-scenes tales of Kensington Palace, which started out as Nottingham House until it was bought in 1698 by William III and transformed into a royal residence after a major renovation. Kate Williams explores some of the more gruesome pieces of palace history, including the grim death of Henry Stuart, the murder of Amy Robsart to clear a path for the queen, and the amazing story of Eleanor Cobham, the 'Royal Witch'