At this time The date of the Council is, however, disputed.  Pagi is for 373, Cave for 367.  Hefele and Ceillier are satisfied of the correctness of 375.  cf. D.C.A. i. 813. some short solace would come to the Catholics in the East in the synodical letter addressed to the Orientals of the important synod held in Illyria, under the authority of Valentinian.  The letter which is extant Theod., Ecc. Hist. iv. 8. is directed against the Macedonian heresy.  The charge of conveying it to the East was given to the presbyter Elpidius. Mansi, iii. 386.  Hefele, § 90.  Valentinian sent with it a letter to the bishops of Asia in which persecution is forbidden, and the excuse of submission to the reigning sovereign anticipated and condemned.  Although the letter runs in the names of Valentinian, Valens, and Gratian, the western brother appears to condemn the eastern. Theod., H.E. iv. 7.