Autograph Letter Signed ‘William Frederick’, regretting that the weather makes it impossible to shoot this morning, but nevertheless looking forward to visiting his correspondent at the Hall. A good one page example, 9 x 7 inches, fine, folds. Liverpool, 29 October . Found among the papers of the Blackburne family of Orford Hall, Warrington. Prince William Frederick (1776-1834), Duke of Gloucester, nicknamed ‘Silly Billy’, son of Prince William Henry, Duke of Gloucester, brother of King George III.