“She was arrested and subsequently imprisoned in the Tower of London for the duration of a year from November 1321 to November 1322, making her the first recorded female prisoner in the Tower's history... Upon her release from the Tower, Margaret entered a religious life at the convent house of the Minorite Sisters outside Aldgate. King Edward granted her a stipend to pay for her maintenance.”1032

See Margaret de Clare, Baroness Badlesmere - Wikipedia, the free encyclopedia.