nAt one meeting a spy
reported that Arthur Thistlewood said: "High Treason was committed against the people at Manchester. I resolved that the lives of the instigators of massacre should atone for the souls of murdered innocents."
planned to assassinate key
members of the cabinet when they met
at Lord Harrowby's for dinner on 22 February 1820.
Lord Castlereagh was one of the targets for the assassination attempt. He has pushed the Six Acts through parliament