I. He complains that Flavian has not sent him a full account of Eutyches' case.
Seeing that our most Christian and merciful Emperor, in his holy and praiseworthy faith and anxiety for the peace of the Catholic Church, has sent us a letter upon the matters which have roused the din of disturbance among you, we wonder, brother, that you have been able to keep silence to us upon the scandal that has been caused, and that you did not rather take measures for our being at once informed by your own report, that we might not have any doubt about the truth of the case.
For we have received a document from the presbyter Eutyches, who complains that on the accusation of bishop Eusebius he has been wrongfully deprived of communion, notwithstanding that he says he attended your summons and did not refuse his presence: and moreover asserts that he presented a deed of appeal in the very court, which was however not accepted: whereupon he was forced to put forth letters of defence in the city of Constantinople. Pending which matter we do not yet know with what justice he has been separated from the communion of the Church.
But having regard to the importance of the matter, we wish to know the reason of your action and to have the whole thing brought to our knowledge: for we, who desire the judgments of the Lord's priests to be deliberate, cannot without information decide one way or another, until we have all the proceedings accurately before us.
Source: Letters (New Advent)