Alexander Shields or Sheilds or Sheills (January 1661 – 1700) was a Scottish, Presbyterian, nonconformist minister, activist, and author. He was imprisoned in London, in Edinburgh and on the Bass Rock for holding private worship services. After his escape from prison he wrote A Hind Let Loose which amongst other things argues for the rights of people to resist tyrants including the bearing of arms and the resistance of taxes. It even argues that assassination, in extreme cases, is sometimes justified. Shields was one of the ministers who supported the Cameronians who disowned the king. They were brutally put down. All three of the Cameronian field-preachers, of which Shields was one, rejoined the church after the Revolution. Shields served as a chaplain to King William's armies in the Low