An archive of royal letters and books unseen for 200 years is to be digitised . The Queen launched project at Windsor Castle 's Royal Library . Included are letters shedding light on the American War of Independence . Also a 200-year-old poetry book written by the Shah of Persia in 1812 . A new exhibition will open today at Buckingham Palace, featuring rare items from the collection including an original copy of Shakespeare's Julius Caesar which was used as part of the Gunpowder Plot plot against King James I Also includes an essay by George III and letters from Queen Charlotte .
An archive of royal letters and books unseen for 200 years is to be digitised . The Queen launched project at Windsor Castle 's Royal Library . Included are letters shedding light on the American War of Independence . Also a 200-year-old poetry book written by the Shah of Persia in 1812 . Queen joked that , 'You do n't get gifts like that any more ! ' Also includes an essay by George III and letters from Queen Charlotte .