Junius letters appeared in a London newspaper, the Public Advertiser, between 1768 and 1772. The letters, signed with the pen name Junius or Philo Junius, caused a sensation because they criticized King George III and his ministers. Over 60 letters were published. Their author never identified himself, but historians believe that Sir Philip Francis, a minor government official and later a member of Parliament, was chiefly responsible for them.
