The Easterns decline the Council at Rome
Athanasius, however, before these things happened, at the first report of their proceedings, sailed to Rome, knowing the rage of the heretics, and for the purpose of having the Council held as had been determined. And Julius wrote letters to them, and sent the Presbyters Elpidius and Philoxenus, appointing a day, that they might either come, or consider themselves as altogether suspected persons. But as soon as Eusebius and his fellows heard that the trial was to be an Ecclesiastical one, at which no Count would be present, nor soldiers stationed before the doors, and that the proceedings would not be regulated by royal order (for they have always depended upon these things to support them against the Bishops, and without them they have no boldness even to speak); they were so alarmed that they detained the Presbyters till after the appointed time, and pretended an unseemly excuse, that they were not able to come now on account of the war which was begun by the Persians. But this was not the true cause of their delay, but the fears of their own consciences. For what have Bishops to do with war? Or if they were unable on account of the Persians to come to Rome, although it is at a distance and beyond sea, why did they like lions go about the parts of the East and those which are near the Persians, seeking who was opposed to them, that they might falsely accuse and banish them?
12. At any rate, when they had dismissed the Presbyters with this improbable excuse, they said to one another, 'Since we are unable to get the advantage in an Ecclesiastical trial, let us exhibit our usual audacity.' Accordingly they write to Philagrius, and cause him after a while to go out with Gregory into Egypt. Whereupon the Bishops are severely scourged and cast into chains. Sarapammon, for instance, Bishop and Confessor, they drive into banishment; Potammon, Bishop and Confessor, who had lost an eye in the persecution, they beat with stripes on the neck so cruelly, that he appeared to be dead before they came to an end. In which condition he was cast aside, and hardly after some hours, being carefully attended and fanned, he revived, God granting him his life; but a short time after he died of the sufferings caused by the stripes, and attained in Christ to the glory of a second martyrdom. And besides these, how many monks were scourged, while Gregory sat by with Balacius the 'Duke!' how many Bishops were wounded! How many virgins were beaten!
Source: Historia Arianorum (New Advent)