Atterbury , who had long been an opponent of Walpole , was named as a conspirator by Mar .
Atterbury , who had long been an opponent of Walpole , was was arrested on 24 August 1722 , to be charged with treason .
Atterbury , who had long been an opponent of Walpole , was named as a conspirator by Mar and was arrested on 24 August 1722 , to be charged with treason .