Edward Sexby

Colonel Edward Sexby (or Saxby; 1616 – 13 January 1658) was an English Puritan soldier and Leveller in the army of Oliver Cromwell. Later he turned against Cromwell and plotted his assassination, which Sexby considered tyrannicide, as a decapitation strike, which would then be followed by a joint regime change uprising by both Cavaliers and Levellers. Failing in his efforts, Sexby was taken prisoner and died in the Tower of London. Provided by Wikipedia