Nicene and Post-Nicene Fathers, Ser. II, Vol. III: The Ecclesiastical History, Dialogues, and Letters of Theodoret.: Letter of John, Bishop of Antioch and his Supporters, to the Clergy of Constantinople.
CLV. Letter of John, Bishop of Antioch and his Supporters, to the Clergy of Constantinople. 2262
This is also merely a short summary of CLII. and CLIII.